{"data":{"slug":"coros-apex-4","type":"smartwatch","brand":"COROS","name":"APEX 4","aliases":["COROS APEX 4","APEX 4 42mm","APEX 4 46mm","W542","W541"],"release_date":"2025-10","url":"https://arkivo.dev/smartwatches/coros-apex-4","specs":{"series":"APEX","model_numbers":["WAPX4-BLK-42","WAPX4-WHT-42","WAPX4-BLK-46","WAPX4-WHT-46","W542","W541"],"gtins":null,"announce_date":"2025-10-15","status":"available","predecessor":null,"successor":null,"launch_price_usd":429,"launch_price_eur":449,"markets":["US","DE"],"colors":["Black","White"],"manufacturer_url":"https://coros.com/apex4","spec_sheet_url":"https://coros.com/apex4/specs","manual_url":"https://support.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4","eprel_registration_number":null,"warranty_years":2,"segment":"outdoor","os_updates_years":null,"security_updates_until":null,"case_sizes_mm":[42,46],"case_shape":"round","case_material":"mixed","case_material_name":"Fiber Reinforced Polymer cover with Grade 5 Titanium Alloy bezel","back_material":null,"case_dimensions_mm":{"height_mm":42.6,"width_mm":42.6,"thickness_mm":14},"weight_g":null,"weight_with_strap_g":44,"water_resistance_atm":5,"water_resistance_standard":null,"ip_rating":null,"dive_rating":null,"dive_max_depth_m":null,"mil_std_810":null,"mil_std_810_tests":null,"operating_temperature_c":{"min_c":-20,"max_c":50},"display_technology":"mip","display_technology_name":"3rd Generation Memory-in-Pixel touch screen","screen_size_in":1.2,"resolution":{"width_px":240,"height_px":240},"pixel_density_ppi":null,"display_area_mm2":null,"touchscreen":true,"refresh_rate_max_hz":null,"refresh_rate_min_hz":null,"brightness_peak_nits":null,"brightness_min_nits":null,"always_on_display":true,"display_cover_material":"sapphire","display_cover":"Sapphire Glass","platform":"proprietary","os_at_launch":null,"os_skin":null,"os_latest":null,"compatible_phone_os":null,"phone_os_requirement":null,"third_party_apps":false,"voice_assistants":null,"chipset":null,"process_node_nm":null,"cpu_core_count":null,"cpu_clusters":null,"cpu_max_ghz":null,"gpu":null,"low_power_coprocessor":null,"ram_gb":null,"storage_gb":[32],"heart_rate_sensor":"Optical heart rate monitor","ecg":null,"spo2":true,"skin_temperature":null,"blood_pressure":null,"bioimpedance":null,"eda_sensor":null,"medical_clearances":null,"accelerometer":true,"accelerometer_max_g":null,"gyroscope":true,"barometer":true,"compass":true,"ambient_light_sensor":null,"depth_gauge":null,"depth_gauge_max_m":null,"water_temperature_sensor":null,"health_features":["blood_oxygen_app","hrv","sleep_tracking","sleep_stages","stress_tracking"],"fitness_features":["vo2_max","training_load","recovery_advice","pool_swim","open_water_swim","interval_workouts","route_navigation","turn_by_turn_navigation","trackback"],"sport_profiles_count":null,"dive_modes":null,"external_sensor_types":["heart_rate_strap","power_meter"],"fall_detection":null,"crash_detection":null,"emergency_sos":true,"emergency_siren_db":null,"live_tracking":true,"led_flashlight":null,"positioning":["GPS","GLONASS","Galileo","BeiDou","QZSS"],"dual_frequency_gnss":true,"offline_maps":true,"bluetooth":true,"bluetooth_version":"5.4","wifi":true,"wifi_standard":"wifi_6","wifi_bands":["2.4ghz"],"cellular":false,"network_technologies":null,"bands_4g":null,"bands_5g":null,"nfc":false,"nfc_payments":false,"payment_services":null,"uwb":null,"satellite_connectivity":["none"],"ant_plus":false,"speaker":true,"microphone_count":null,"calls_on_watch":"phone_only","offline_music":true,"button_count":2,"hardware_buttons":["Back/Lap Button","Action Button"],"crown":"rotating","rotating_bezel":null,"gesture_controls":null,"battery_capacity_mah":null,"battery_life_claimed":[{"mode":"smartwatch","with_solar":false,"hours":360},{"mode":"gps_autoselect","with_solar":false,"hours":41},{"mode":"gps_autoselect_with_music","with_solar":false,"hours":11},{"mode":"gps_all_systems","with_solar":false,"hours":34},{"mode":"gps_all_systems_with_music","with_solar":false,"hours":10},{"mode":"gps_dual_frequency","with_solar":false,"hours":26},{"mode":"gps_dual_frequency_with_music","with_solar":false,"hours":9}],"battery_life_smartwatch_claimed_h":360,"battery_life_always_on_claimed_h":null,"battery_life_gps_claimed_h":null,"solar_charging":null,"charging_method":"proprietary_plug","charging_notes":"The COROS A2 charging adapter clips onto the pins on the back of the watch and takes any standard USB-C cable. COROS asks for an LPS-certified charger and official accessories only. It says not to use a battery pack with quick-charge capability. The store FAQ says 0 to 100% in under 2 hours.","charging_max_w":null,"fast_charging":null,"quick_charge":null,"charge_time_0_80_min":null,"charge_time_0_100_min":null,"measured_brightness_nits":null,"measured_battery_active_use_h":null,"battery_life_measured":null,"measured_charge_time_min":101,"band_width_mm":22,"quick_release":true,"band_compatibility":"Quick release, 22 mm on the 42 mm case and 24 mm on the 46 mm case","band_material":null,"band_name":null,"band_sizes":[{"size_label":"Nylon and silicone","wrist_min_mm":135,"wrist_max_mm":205}],"fcc_ids":["2BBGF-W542","2BBGF-W541"],"sar_limb_w_kg":0.48,"sar_eu_limb_w_kg":null,"other_certifications":null,"in_the_box":["COROS APEX 4 GPS Watch","COROS A2 Charging Adapter"],"charger_in_box":false},"variants":[{"model_number":"WAPX4-BLK-42","colors":["Black"],"case_sizes_mm":[42],"case_dimensions_mm":{"height_mm":42.6,"width_mm":42.6,"thickness_mm":14},"weight_with_strap_g":44,"screen_size_in":1.2,"resolution":{"width_px":240,"height_px":240},"band_width_mm":22,"band_sizes":[{"size_label":"Nylon and silicone","wrist_min_mm":135,"wrist_max_mm":205}],"battery_life_claimed":[{"mode":"smartwatch","with_solar":false,"hours":360},{"mode":"gps_autoselect","with_solar":false,"hours":41},{"mode":"gps_autoselect_with_music","with_solar":false,"hours":11},{"mode":"gps_all_systems","with_solar":false,"hours":34},{"mode":"gps_all_systems_with_music","with_solar":false,"hours":10},{"mode":"gps_dual_frequency","with_solar":false,"hours":26},{"mode":"gps_dual_frequency_with_music","with_solar":false,"hours":9}],"launch_price_usd":429,"launch_price_eur":449,"fcc_ids":["2BBGF-W542"]},{"model_number":"WAPX4-WHT-42","colors":["White"],"case_sizes_mm":[42],"case_dimensions_mm":{"height_mm":42.6,"width_mm":42.6,"thickness_mm":14},"weight_with_strap_g":44,"screen_size_in":1.2,"resolution":{"width_px":240,"height_px":240},"band_width_mm":22,"band_sizes":[{"size_label":"Nylon and silicone","wrist_min_mm":135,"wrist_max_mm":205}],"battery_life_claimed":[{"mode":"smartwatch","with_solar":false,"hours":360},{"mode":"gps_autoselect","with_solar":false,"hours":41},{"mode":"gps_autoselect_with_music","with_solar":false,"hours":11},{"mode":"gps_all_systems","with_solar":false,"hours":34},{"mode":"gps_all_systems_with_music","with_solar":false,"hours":10},{"mode":"gps_dual_frequency","with_solar":false,"hours":26},{"mode":"gps_dual_frequency_with_music","with_solar":false,"hours":9}],"launch_price_usd":429,"launch_price_eur":449,"fcc_ids":["2BBGF-W542"]},{"model_number":"WAPX4-BLK-46","colors":["Black"],"case_sizes_mm":[46],"case_dimensions_mm":{"height_mm":46.2,"width_mm":46.2,"thickness_mm":13.7},"weight_with_strap_g":51,"screen_size_in":1.3,"resolution":{"width_px":260,"height_px":260},"band_width_mm":24,"band_sizes":[{"size_label":"Nylon and silicone","wrist_min_mm":140,"wrist_max_mm":215}],"battery_life_claimed":[{"mode":"smartwatch","with_solar":false,"hours":576},{"mode":"gps_autoselect","with_solar":false,"hours":65},{"mode":"gps_autoselect_with_music","with_solar":false,"hours":17},{"mode":"gps_all_systems","with_solar":false,"hours":53},{"mode":"gps_all_systems_with_music","with_solar":false,"hours":16},{"mode":"gps_dual_frequency","with_solar":false,"hours":41},{"mode":"gps_dual_frequency_with_music","with_solar":false,"hours":15}],"launch_price_usd":479,"launch_price_eur":499,"fcc_ids":["2BBGF-W541"]},{"model_number":"WAPX4-WHT-46","colors":["White"],"case_sizes_mm":[46],"case_dimensions_mm":{"height_mm":46.2,"width_mm":46.2,"thickness_mm":13.7},"weight_with_strap_g":51,"screen_size_in":1.3,"resolution":{"width_px":260,"height_px":260},"band_width_mm":24,"band_sizes":[{"size_label":"Nylon and silicone","wrist_min_mm":140,"wrist_max_mm":215}],"battery_life_claimed":[{"mode":"smartwatch","with_solar":false,"hours":576},{"mode":"gps_autoselect","with_solar":false,"hours":65},{"mode":"gps_autoselect_with_music","with_solar":false,"hours":17},{"mode":"gps_all_systems","with_solar":false,"hours":53},{"mode":"gps_all_systems_with_music","with_solar":false,"hours":16},{"mode":"gps_dual_frequency","with_solar":false,"hours":41},{"mode":"gps_dual_frequency_with_music","with_solar":false,"hours":15}],"launch_price_usd":479,"launch_price_eur":499,"fcc_ids":["2BBGF-W541"]}],"sources":[{"url":"https://coros.com/apex4/specs","kind":"manufacturer_page","accessed":"2026-10-15","fields":["series","segment","status","case_sizes_mm","case_shape","case_material","case_material_name","case_dimensions_mm","weight_with_strap_g","water_resistance_atm","operating_temperature_c","display_technology","display_technology_name","screen_size_in","resolution","touchscreen","always_on_display","display_cover_material","display_cover","storage_gb","heart_rate_sensor","spo2","accelerometer","gyroscope","barometer","compass","health_features","fitness_features","external_sensor_types","positioning","dual_frequency_gnss","offline_maps","bluetooth","wifi","cellular","satellite_connectivity","ant_plus","speaker","calls_on_watch","offline_music","button_count","hardware_buttons","crown","battery_life_claimed","band_width_mm","quick_release","band_compatibility","band_sizes","spec_sheet_url","colors","platform","variants"],"notes":{"series":"COROS APEX line. The overview page lists APEX in 2018, APEX Pro in 2019, APEX 2 in 2022 and APEX 4 in October 2025.","segment":"COROS calls it a mountain sports GPS watch for trail running, climbing and skiing. The store files it under GPS watches. Stored as outdoor.","status":"The COROS US and EU stores list both sizes with a Buy now button.","case_sizes_mm":"Two sizes sold as one product, 42 mm and 46 mm. Base values describe the 42 mm case.","case_shape":"Round case with a round Memory-in-Pixel display.","case_material":"Materials: cover material Fiber Reinforced Polymer and bezel material Grade 5 Titanium Alloy. Stored as mixed.","case_material_name":"Materials: Cover Material Fiber Reinforced Polymer, Bezel Material Grade 5 Titanium Alloy.","case_dimensions_mm":"Size and Weight, Dimensions: 42 mm 42.6 x 42.6 x 14 mm and 46 mm 46.2 x 46.2 x 13.7 mm. Height does not include the optical heart rate sensor. The 46 mm is thinner than the 42 mm as published. The5krunner repeats both figures.","weight_with_strap_g":"Weight: 42 mm 44 g with nylon band and 56 g with silicone band. 46 mm 51 g with nylon band and 64 g with silicone band. The nylon band figure is stored. The maker publishes no case-only weight.","water_resistance_atm":"Durability: 5 ATM, suitable for surface water activities and not for diving. The buy page calls it WR50 certified.","operating_temperature_c":"Durability: working temperature -4 F to 122 F (-20 C to 50 C). Storage temperature -20 C to 60 C is not stored.","display_technology":"Display: 3rd Generation Memory-in-Pixel touch screen.","display_technology_name":"Display, Display Type verbatim.","screen_size_in":"Display Size: 1.2 inches on the 42 mm and 1.3 inches on the 46 mm.","resolution":"Display Resolution: 240 x 240 on the 42 mm and 260 x 260 on the 46 mm.","touchscreen":"Display Type says touch screen. The feature list names Touch Scroll.","always_on_display":"Daily Features list Always-On Display. The overview calls it a 3rd generation always-on MIP display.","display_cover_material":"Materials: Screen Material Sapphire Glass.","display_cover":"Materials: Screen Material Sapphire Glass.","storage_gb":"Memory: internal memory 32 GB, with room for 1200 hours of activity data (estimate based on outdoor activities).","heart_rate_sensor":"Data Tracking: Optical Heart Rate Monitor (may not work over tattoos). The sensor generation is not named.","spo2":"Data Tracking: Optical Pulse Oximeter.","accelerometer":"Data Tracking: Accelerometer.","gyroscope":"Data Tracking: Gyroscope.","barometer":"Data Tracking: Barometric Altimeter. The overview names a dual-range barometer.","compass":"Data Tracking: 3D Compass.","health_features":"Daily Features: Daily Stress, Sleep (with REM tracking), HRV, Wellness Check. Data Tracking: Optical Pulse Oximeter. Continuous heart rate is not stored because the page does not state it. The Electrical Heart Rate Sensor is for HRV and wellness checks, so no ECG is stored.","fitness_features":"Training Features: EvoLab with recovery, fatigue, training load and VO2 max, Basic Interval Training, Training Plans. Navigation: Landscape and Topo map layers, turn-by-turn directions and Back-To-Start. Supported Activity Modes list Open Water and Pool Swim. Running dynamics need a COROS POD, so they are not stored.","external_sensor_types":"Connectivity: accessories over Bluetooth. Training Features: Running Form Test requires COROS POD or POD 2. The buy page FAQ names BLE heart rate monitors and cycling power. No other sensor types are stated.","positioning":"Geo Location, Satellite Systems: GPS, GLONASS, Galileo, Beidou, QZSS.","dual_frequency_gnss":"Geo Location: GNSS chipset All-Satellite Dual-Frequency.","offline_maps":"Navigation: map layers Landscape and Topo as downloadable global maps. The setup guide downloads maps to the watch through Map Manager.","bluetooth":"Connectivity: phone and accessories connect over Bluetooth.","wifi":"Connectivity: data sync over Wi-Fi and the COROS app.","cellular":"Connectivity lists Bluetooth and Wi-Fi only. No cellular radio is listed.","satellite_connectivity":"Connectivity lists Bluetooth and Wi-Fi only. No satellite link is listed.","ant_plus":"Connectivity: accessories over Bluetooth. ANT+ is not listed.","speaker":"Data Tracking: speaker to take hands-free calls or play activity alerts out loud.","calls_on_watch":"Speaker to take hands-free calls. The watch has no cellular radio, so calls go through the paired phone. Daily Features: Message/Call Alert.","offline_music":"Daily Features: Music, plays offline music when paired with supported Bluetooth headsets.","button_count":"Design lists Digital Dial, Back Button and Action Button. The dial is a rotating control and is not counted in the two buttons.","hardware_buttons":"Design: Back Button and Action Button.","crown":"Design: Digital Dial. The setup guide says to scroll the dial to move the selection and press to confirm. No haptic claim.","battery_life_claimed":"Battery table. 42 mm: Endurance All Systems 41 h (11 h with offline music), All Systems On 34 h (10 h), Dual Frequency 26 h (9 h), Daily Use 15 days. 46 mm: Endurance 65 h (17 h), All Systems On 53 h (16 h), Dual Frequency 41 h (15 h), Daily Use 24 days. Days are converted to hours exactly. The Battery Specifications article names the daily use row as sleep tracking plus daily stress. The setup guide says the Endurance preset picks satellite systems intelligently, so it is stored as GPS automatic system selection. Always-on display use in these figures is not stated. The standard GPS row is empty.","band_width_mm":"Strap: width 22 mm on the 42 mm case and 24 mm on the 46 mm case.","quick_release":"Strap: installation type Quick Release.","band_compatibility":"Strap: width 22 mm (42 mm) and 24 mm (46 mm), installation type Quick Release.","band_sizes":"Strap: 135-205 mm for silicone and nylon on the 42 mm. 140-215 mm for both on the 46 mm. The spec page lists size ranges per strap material with the same numbers.","spec_sheet_url":"The maker's technical specifications page.","colors":"The store sells white and black watch bodies, each with nylon or silicone straps in several strap colours. Stored are the body colours.","platform":"COROS own firmware, updated through Wi-Fi and the COROS app. No Wear OS, watchOS or HarmonyOS.","variants":"Four sold configurations: 42 mm and 46 mm, each in black or white. Per-size values are from the spec page. The store SKU names carry the size and colour."}},{"url":"https://shop.coros.com/products.json?limit=250","kind":"manufacturer_page","accessed":"2026-10-15","fields":["model_numbers","colors"],"notes":{"model_numbers":"US store feed SKUs WAPX4-BLK-42, WAPX4-WHT-42, WAPX4-BLK-46 and WAPX4-WHT-46 for the watch alone. The feed has no barcodes, so no GTIN is stored.","colors":"Store option WATCH BODY COLOR: White, Black."}},{"url":"https://coros.com/apex4","kind":"manufacturer_page","accessed":"2026-10-15","fields":["manufacturer_url","weight_with_strap_g","battery_life_claimed"],"notes":{"manufacturer_url":"The maker's product overview page.","weight_with_strap_g":"Overview: 51 g (46 mm) and 44 g (42 mm) with the nylon band.","battery_life_claimed":"Overview: up to 65 hours of All Systems GPS on the 46 mm or 41 hours on the 42 mm, marked as Endurance Satellite Mode. Matches the spec table."}},{"url":"https://coros.com/buy/apex4","kind":"manufacturer_page","accessed":"2026-10-15","fields":["nfc_payments","charging_notes","external_sensor_types","offline_music"],"notes":{"nfc_payments":"FAQ: Payment is not supported.","charging_notes":"FAQ: 0 to 100% in under 2 hours. The box note says the USB-C charging cable is not included.","external_sensor_types":"FAQ: external sensors over BLE for HRM, cycling power and more.","offline_music":"FAQ: offline MP3 music is available directly from the watch."}},{"url":"https://coros.com/stories/press-release/c/coros-announces-apex-4","kind":"press_release","accessed":"2026-10-15","fields":["announce_date","release_date","launch_price_usd"],"notes":{"announce_date":"Release dated 15 October 2025 in Irvine, California.","release_date":"Available from 15 October 2025 through COROS.com/APEX4 and select retailers.","launch_price_usd":"42 mm 429 USD and 46 mm 479 USD. US prices exclude sales tax."}},{"url":"https://coros.com/de/buy/apex4","kind":"manufacturer_page","accessed":"2026-10-15","fields":["launch_price_eur","markets"],"notes":{"launch_price_eur":"COROS Germany store: 449 EUR for the 42 mm and 499 EUR for the 46 mm, including VAT. The EU store feed published the German product on 2025-10-15 at the same prices. This is the same price as today, since no launch-day German price list was found.","markets":"US store product page and the German store page both sell the watch."}},{"url":"https://support.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4","kind":"manual","accessed":"2026-10-15","fields":["manual_url","in_the_box","charger_in_box","hardware_buttons","button_count","crown","charging_method","offline_maps","health_features","external_sensor_types"],"notes":{"manual_url":"Setup guide for the APEX 4, last edited 2026-10-14. COROS publishes no separate PDF manual.","in_the_box":"What's In the Box: COROS APEX 4 GPS Watch and COROS A2 Charging Adapter. The buy page says no USB-C cable is included.","charger_in_box":"The box has the A2 adapter and no USB-C cable or power adapter.","hardware_buttons":"Operating APEX 4: Digital Dial (top right), Back/Lap Button (bottom right) and Action Button (bottom left).","button_count":"Operating APEX 4 lists the dial, the Back/Lap button and the Action button.","crown":"Digital Dial: scroll to move the selection, press to confirm.","charging_method":"Charging APEX 4: metal pins on the A2 adapter fit into the charging port on the back of the watch and snap into place. A standard USB-C cable connects to the adapter.","offline_maps":"Maps and Navigation: download global landscape and topographic maps to the watch in the COROS app Map Manager.","health_features":"Sleep and Wellness Features: sleep and nap tracking, overnight HRV and wellness checks. Control Center has an Oximeter for SpO2 readings.","external_sensor_types":"The guide names no sensor types."}},{"url":"https://support.coros.com/hc/en-us/articles/41966405480340","kind":"manual","accessed":"2026-10-15","fields":["charging_method","charging_notes"],"notes":{"charging_method":"Charging Your APEX 4: the adapter pins fit into the port on the back and the adapter takes any standard USB-C cable. Charging works during an activity.","charging_notes":"Use an LPS-certified charger. Use official accessories only. Do not use a power bank with quick-charge capability."}},{"url":"https://support.coros.com/hc/en-us/articles/23476623096980-Battery-Specifications","kind":"manufacturer_page","accessed":"2026-10-15","fields":["battery_life_claimed"],"notes":{"battery_life_claimed":"APEX 4 (42) table: Endurance 41 h, All Systems On / High 34 h, Dual Frequency / Max 26 h, daily use with sleep tracking and daily stress 15 days. APEX 4 (46): Endurance 65 h, All Systems 53 h, Dual Frequency 41 h, daily use 24 days. Same figures as the spec page. Actual use can be higher with backlight, navigation and accessories."}},{"url":"https://support.coros.com/hc/en-us/articles/25514157012116-Safety-Alerts","kind":"manufacturer_page","accessed":"2026-10-15","fields":["emergency_sos"],"notes":{"emergency_sos":"The APEX 4 is on the device list. Press and hold the dial for 7 seconds, then press once to confirm. Preset contacts (up to 3) get a text with a live location link. Needs the paired phone with cell service. It does not contact local emergency services."}},{"url":"https://support.coros.com/hc/en-us/articles/51716258730772-How-to-Use-Live-Tracking","kind":"manufacturer_page","accessed":"2026-10-15","fields":["live_tracking"],"notes":{"live_tracking":"The APEX 4 is on the device list. Live Tracking works for outdoor activities and needs the phone connected with the COROS app running."}},{"url":"https://support.coros.com/hc/en-us/articles/360039803532-COROS-Warranty-Policy","kind":"manufacturer_page","accessed":"2026-10-15","fields":["warranty_years"],"notes":{"warranty_years":"COROS offers a 2-year warranty from the original activation date for watches. Straps have 180 days. Local consumer law rights may differ."}},{"url":"https://coros.com/stories/latest-news/c/get-more-from-navigation","kind":"manufacturer_page","accessed":"2026-10-15","fields":["fitness_features"],"notes":{"fitness_features":"COROS blog: Back to Start uses the GPS points logged during the activity and guides you back along the same path. The spec page lists Back-To-Start for the APEX 4 and the Using Navigation Features article lists the APEX 4."}},{"url":"https://fccid.co/fcc/2BBGF-W542","kind":"regulatory","accessed":"2026-10-15","fields":["fcc_ids","model_numbers"],"notes":{"fcc_ids":"FCC ID 2BBGF-W542 is COROS APEX 4 42mm, grant date Nov 28, 2025. Read on a public mirror of the FCC filing.","model_numbers":"FCC model W542 is the 42 mm. W541 is the 46 mm."}},{"url":"https://fccid.co/fcc/2BBGF-W541","kind":"regulatory","accessed":"2026-10-15","fields":["fcc_ids"],"notes":{"fcc_ids":"FCC ID 2BBGF-W541 is COROS APEX 4 46mm, grant date Nov 27, 2025."}},{"url":"https://fccid.co/api/files/s2/fccids/2BBGF-W542/files/4fa28337_SAR_report.pdf","kind":"regulatory","accessed":"2026-10-15","fields":["bluetooth_version","wifi_standard","wifi_bands","sar_limb_w_kg"],"notes":{"bluetooth_version":"Test report CTB25071300230RH04 (W542, issued 2025-08-23): Bluetooth Version 5.4, with BLE and EDR.","wifi_standard":"Same report: Wi-Fi specification 2.4G IEEE 802.11b/g/n/ax, so Wi-Fi 6 on 2.4 GHz.","wifi_bands":"Same report: Wi-Fi 2412-2462 MHz, 11 channels. No 5 GHz band is listed.","sar_limb_w_kg":"Same report, W542 (42 mm): maximum reported 10 g wrist-worn SAR 0.48 W/kg at 0 mm (Wi-Fi 2.4 GHz). Limit 4.0 W/kg. The 46 mm W541 report (CTB25071300229RH04) gives 0.52 W/kg. US regime."}},{"url":"https://the5krunner.com/specs/coros/apex-4/","kind":"spec_database","accessed":"2026-10-15","fields":["release_date","nfc","ant_plus"],"notes":{"release_date":"Release date 15 October 2025. Launch prices 429 USD (42 mm) and 479 USD (46 mm).","nfc":"NFC: No. The maker's FAQ says payment is not supported.","ant_plus":"ANT+: No."}},{"url":"https://www.outdoorgearlab.com/reviews/camping-and-hiking/gps-watch/coros-apex-4","kind":"review_site","accessed":"2026-10-15","fields":["measured_charge_time_min","third_party_apps"],"notes":{"measured_charge_time_min":"The review reports about 101 minutes from empty to full with the USB-C charging adapter on the 46 mm model tested. The charger and power source are not stated. The claim is under 2 hours.","third_party_apps":"The review says the watch has no third-party apps and no contactless payments."}}],"fields_filled":75,"updated":"2026-10-15"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}