{"data":{"slug":"xiaomi-watch-s4","type":"smartwatch","brand":"Xiaomi","name":"Watch S4","aliases":["Xiaomi Watch S4 47.3mm","Watch S4 47mm","M2425W1"],"release_date":"2025-03","url":"https://arkivo.dev/smartwatches/xiaomi-watch-s4","specs":{"series":"Watch S","model_numbers":["M2425W1","BHR9195GL","BHR9197GL","BHR9199GL"],"gtins":["6941812732403","6941812707432","6941812711668"],"announce_date":"2024-10-29","status":"available","predecessor":null,"successor":"xiaomi-watch-s5-46mm","launch_price_usd":null,"launch_price_eur":159.99,"markets":["EU"],"colors":["Black","Silver","Rainbow"],"manufacturer_url":"https://www.mi.com/global/product/xiaomi-watch-s4/","spec_sheet_url":"https://www.mi.com/global/product/xiaomi-watch-s4/specs/","manual_url":null,"eprel_registration_number":null,"warranty_years":null,"segment":"smartwatch","os_updates_years":null,"security_updates_until":"2027-03-02","case_sizes_mm":[47.3],"case_shape":"round","case_material":"aluminium","case_material_name":"Aluminium alloy middle frame with PVD coating and stainless steel bezel","back_material":null,"case_dimensions_mm":{"height_mm":47.3,"width_mm":47.3,"thickness_mm":12},"weight_g":44.5,"weight_with_strap_g":null,"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":-10,"max_c":45},"display_technology":"oled","display_technology_name":"AMOLED","screen_size_in":1.43,"resolution":{"width_px":466,"height_px":466},"pixel_density_ppi":326,"display_area_mm2":null,"touchscreen":true,"refresh_rate_max_hz":60,"refresh_rate_min_hz":null,"brightness_peak_nits":2200,"brightness_min_nits":null,"always_on_display":true,"display_cover_material":"other_glass","display_cover":"Panda Glass","platform":"proprietary","os_at_launch":"Xiaomi HyperOS 2","os_skin":null,"os_latest":null,"compatible_phone_os":["android","ios"],"phone_os_requirement":"Android 8.0 or later, or iOS 14.0 or later, with the Mi Fitness app","third_party_apps":null,"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":null,"heart_rate_sensor":"Heart rate sensor (with blood oxygen sensor)","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":true,"depth_gauge":null,"depth_gauge_max_m":null,"water_temperature_sensor":null,"health_features":["continuous_heart_rate","blood_oxygen_app","sleep_tracking","sleep_stages","stress_tracking","cycle_tracking"],"fitness_features":["auto_workout_detection","vo2_max","training_load","running_dynamics","pool_swim","open_water_swim"],"sport_profiles_count":null,"dive_modes":null,"external_sensor_types":null,"fall_detection":null,"crash_detection":null,"emergency_sos":null,"emergency_siren_db":null,"live_tracking":null,"led_flashlight":null,"positioning":["GPS (L1 + L5)","Galileo (E1 + E5a)","GLONASS (G1)","BeiDou (B1I + B1C + B2a)","QZSS (L1 + L5)"],"dual_frequency_gnss":true,"offline_maps":null,"bluetooth":true,"bluetooth_version":"5.3","wifi":false,"wifi_standard":null,"wifi_bands":null,"cellular":false,"network_technologies":null,"bands_4g":null,"bands_5g":null,"nfc":true,"nfc_payments":true,"payment_services":["Xiaomi Pay"],"uwb":null,"satellite_connectivity":null,"ant_plus":null,"speaker":true,"microphone_count":2,"calls_on_watch":"phone_only","offline_music":true,"button_count":1,"hardware_buttons":["Power button (4 o'clock)"],"crown":"rotating","rotating_bezel":"none","gesture_controls":["Raise to wake","Double-tap to wake","Wrist flip","Wrist shake","Finger snap","Fist clench"],"battery_capacity_mah":486,"battery_life_claimed":[{"mode":"smartwatch","with_solar":false,"hours":360},{"mode":"always_on","with_solar":false,"hours":120}],"battery_life_smartwatch_claimed_h":360,"battery_life_always_on_claimed_h":120,"battery_life_gps_claimed_h":null,"solar_charging":null,"charging_method":"magnetic_pins","charging_notes":"2-pin magnetic charging dock with a USB-A cable. The FAQ asks for a USB-A charger with 5 V output and at least 0.5 A.","charging_max_w":null,"fast_charging":true,"quick_charge":{"charge_min":5,"use_h":48},"charge_time_0_80_min":null,"charge_time_0_100_min":60,"measured_brightness_nits":null,"measured_battery_active_use_h":null,"battery_life_measured":[{"test":"mixed_use_always_on","hours":48}],"measured_charge_time_min":null,"band_width_mm":22,"quick_release":true,"band_compatibility":"22 mm quick-release straps with spring bars","band_material":"fluoroelastomer","band_name":"Fluororubber strap","band_sizes":[{"size_label":"Black fluororubber strap","wrist_min_mm":140,"wrist_max_mm":210}],"fcc_ids":null,"sar_limb_w_kg":null,"sar_eu_limb_w_kg":0.232,"other_certifications":["EU RED 2014/53/EU conformity","RoHS 2011/65/EU conformity"],"in_the_box":["Xiaomi Watch S4 (including bezel and strap)","Magnetic charging dock","User manual (including warranty notice)"],"charger_in_box":false},"variants":[{"model_number":"BHR9195GL","gtin":"6941812732403","colors":["Black"],"launch_price_eur":159.99},{"model_number":"BHR9197GL","gtin":"6941812707432","colors":["Silver"]},{"model_number":"BHR9199GL","gtin":"6941812711668","colors":["Rainbow"],"band_material":"other","band_name":"Fluororubber strap and nylon strap","band_sizes":[{"size_label":"Rainbow fluororubber and nylon straps","wrist_min_mm":135,"wrist_max_mm":210}]}],"sources":[{"url":"https://www.mi.com/global/product/xiaomi-watch-s4/specs/","kind":"manufacturer_page","accessed":"2026-10-15","fields":["spec_sheet_url","case_dimensions_mm","weight_g","case_material","water_resistance_atm","screen_size_in","resolution","pixel_density_ppi","touchscreen","refresh_rate_max_hz","brightness_peak_nits","platform","os_at_launch","compatible_phone_os","phone_os_requirement","heart_rate_sensor","spo2","accelerometer","gyroscope","ambient_light_sensor","compass","barometer","positioning","bluetooth","bluetooth_version","nfc","speaker","microphone_count","calls_on_watch","battery_capacity_mah","charging_method","charging_notes","band_sizes","in_the_box","charger_in_box","colors","display_technology_name","case_sizes_mm","display_technology"],"notes":{"spec_sheet_url":"Global specs page. Base case and strap describe the Black version.","case_dimensions_mm":"47.3 x 47.3 x 12.0 mm. The maker excludes the strap and protrusions. The FAQ gives 14.13 mm thickness with the heart rate bump.","weight_g":"44.5 g approx., without the in-box strap.","case_material":"Aluminum alloy frame. The bezel is stainless steel according to the support FAQ.","water_resistance_atm":"5 ATM, described as 50 m static pressure. The maker says it is not suitable for hot showers, saunas or diving.","screen_size_in":"1.43-inch AMOLED display, 466 x 466 pixels.","pixel_density_ppi":"Published PPI 326.","refresh_rate_max_hz":"60 Hz refresh rate. The maker notes it may vary across interfaces.","brightness_peak_nits":"Peak 2200 nits is when only part of the screen lights up. HBM 1500 nits is the full-screen maximum. No reviewer measurement is substituted.","platform":"Operating system: Xiaomi HyperOS 2, Xiaomi's own software. No Wear OS or other third-party watch platform is named.","compatible_phone_os":"Supports Android 8.0 and above, or iOS 14.0 and above.","phone_os_requirement":"The Mi Fitness app is required for pairing according to the support FAQ.","heart_rate_sensor":"Sensors row: heart rate sensor (with blood oxygen sensor). No sensor generation is named.","compass":"Sensors row lists an electronic compass.","positioning":"Satellite systems: GPS, Galileo, Glonass, BeiDou and QZSS. The overview page says L1+L5 dual-frequency GNSS. The per-constellation bands come from the reseller copy of the manual regulatory table.","bluetooth_version":"Wireless connectivity: Bluetooth 5.3.","nfc":"NFC: Supported. The maker says availability may vary by region.","calls_on_watch":"Bluetooth calling: Supported while the watch stays connected to the phone's Bluetooth. Voice calls from third-party apps are not supported.","microphone_count":"Spec row: 2 mics.","battery_capacity_mah":"Capacity 486 mAh. Rated or typical is not stated.","charging_method":"Charging port: 2-pin magnetic charging dock.","charging_notes":"The support FAQ gives the supply requirement.","band_sizes":"The Black and Silver fluororubber straps have an adjustable length of 140-210 mm approx. The maker publishes strap length, stored as the wrist range. The Rainbow set with fluororubber and nylon straps is 135-210 mm.","in_the_box":"Package contents row.","charger_in_box":"Package contents list only the watch, magnetic charging dock and manual. No power adapter.","colors":"Silver, Rainbow and Black.","display_technology_name":"Spec row: AMOLED display.","case_sizes_mm":"The maker states 47.3 mm x 47.3 mm x 12.0 mm. The separate 41 mm Watch S4 has its own page and is not included.","display_technology":"Spec row: 1.43-inch AMOLED display. No LTPO is stated."}},{"url":"https://www.mi.com/global/product/xiaomi-watch-s4/","kind":"manufacturer_page","accessed":"2026-10-15","fields":["manufacturer_url","always_on_display","dual_frequency_gnss","fast_charging","quick_charge","battery_life_claimed","nfc_payments","gesture_controls","crown","fitness_features","health_features","segment","status"],"notes":{"segment":"The page sits under Wearables as the Xiaomi Watch S4 smartwatch with a rotating crown and 150+ sports modes.","status":"The global product page is live with specs and a buy link. GSMArena lists it as available.","always_on_display":"Support FAQ has the AOD controls. The overview page announces colour always-on displays.","dual_frequency_gnss":"Overview: L1+L5 dual-frequency GNSS of five satellite positioning systems from an independent chip.","fast_charging":"Overview headline: 5 minutes of fast charging delivers 2 days of usage.","quick_charge":"5 minutes of charging for 2 days of usage. The FAQ says this follows the typical battery model, which is the typical-use workload.","battery_life_claimed":"Up to 15 days typical usage, tested by Xiaomi Internal Labs with factory defaults, AOD off, 100 messages a day, 200 wrist raises a day, 90 minutes of GNSS sports a week and 10-minute heart rate checks. The FAQ gives 14.5 days with an iPhone and 5 days with the Smart AOD option on. Days are converted exactly to hours.","nfc_payments":"NFC payment supports Mastercard and Visa terminals. Availability varies by region and issuing bank.","gesture_controls":"Quick gestures and a classic rotating crown are listed. The support FAQ names the gestures.","crown":"The overview describes a classic rotating crown.","fitness_features":"Overview: running form recognition (vertical ratio, vertical amplitude, ground contact time) and 150+ sports modes.","health_features":"Overview: heart rate, stress, blood oxygen and sleep monitoring, all-day options that need to be switched on. These are not medical features."}},{"url":"https://www.mi.com/global/support/faq/details/KA-517264/","kind":"manufacturer_page","accessed":"2026-10-15","fields":["case_shape","case_material","case_material_name","display_cover_material","display_cover","water_resistance_atm","quick_release","band_width_mm","band_compatibility","band_material","band_name","button_count","hardware_buttons","crown","rotating_bezel","gesture_controls","battery_life_claimed","charge_time_0_100_min","quick_charge","charging_notes","offline_music","health_features","fitness_features","always_on_display","ambient_light_sensor","weight_g","case_dimensions_mm","series","payment_services"],"notes":{"series":"Q4 compares the Watch S4 with its predecessor, the Xiaomi Watch S3, in the same Watch S line.","payment_services":"NFC related: bank cards are added through Mi Fitness, Device, Apps, Xiaomi Pay.","case_shape":"Q2: round AMOLED display and 47.3 mm diameter.","case_material":"Q2: middle frame entirely aluminium alloy, bezel stainless steel.","case_material_name":"Q2 and the S3 comparison: aluminium alloy with PVD coating, stainless steel bezel.","display_cover_material":"Q2: Panda Glass cover. It is not a named Gorilla Glass or sapphire.","display_cover":"Q2: Panda Glass.","water_resistance_atm":"Q9: 5 ATM, equivalent to 50 m, for pool and shallow-water use and not for diving.","quick_release":"Q6: the watch supports quick-release straps released through the spring bar.","band_width_mm":"Q7: strap width 22 mm.","band_compatibility":"Q6 and Q7: quick-release spring-bar straps, any 22 mm strap.","band_material":"Spec page names fluororubber straps for Black and Silver. Fluororubber is stored as fluoroelastomer.","band_name":"Spec page strap rows for Black and Silver.","button_count":"Q2: the 2 o'clock position has the function button and rotating crown. The 4 o'clock position has the power button. The crown is counted only in Crown.","hardware_buttons":"Q2: power button at 4 o'clock.","crown":"Q2: stainless steel rotating crown that also works as a function button.","rotating_bezel":"Q11: the bezel is a removable decorative part that twists on for installation. The maker describes no bezel input.","gesture_controls":"Q24 lists wrist flip, wrist shake, finger snap and fist. Fist works only with HyperOS 2 phones. Raise to wake and double-tap to wake are in the display settings.","battery_life_claimed":"Charging and Battery Q1: typical 15 days (14.5 with an iPhone) and AOD 5 days, with the stated test conditions.","charge_time_0_100_min":"Charging Q1 and Q2: about 60 minutes to fully charge.","quick_charge":"Charging Q1: 5 minutes of charging provides a 2-day boost under the typical battery model.","charging_notes":"Charging Q2: USB-A charger with 5 V and at least 0.5 A output.","offline_music":"Q28: local music playback on the watch. An Android phone downloads the music. An iPhone cannot download songs, but songs already on the watch play.","health_features":"Health pages: all-day heart rate, blood oxygen and stress, sleep stages (deep, light, REM, awake) and the Cycles app.","fitness_features":"Workout Q1: auto detect for walking, running, cycling, rower, elliptical and jump rope. Q2 workout data: vertical stride ratio, vertical amplitude and ground contact time in running. 17 modes give pro data including pool and open water swimming. The Training State app manages training load.","always_on_display":"Q26: Always-on display supported, with Smart or Scheduled modes.","ambient_light_sensor":"Brightness Auto adjusts to ambient light.","weight_g":"Q2: 44.5 +/- 1 g, excluding the strap.","case_dimensions_mm":"Q2: diameter 47.3 mm, thickness 12 mm excluding the deco and heart rate sensor."}},{"url":"https://i02.appmifile.com/229_operatorx_operatorx_xm/29/08/2026/0506b1d933bea38854867532d7b1e253.pdf","kind":"manufacturer_pdf","accessed":"2026-10-15","fields":["model_numbers","other_certifications"],"notes":{"other_certifications":"The declaration covers RE Directive 2014/53/EU and RoHS Directive 2011/65/EU.","model_numbers":"EU Declaration of Conformity for radio equipment model M2425W1, Smart Watch, listed on Xiaomi's declaration page as Xiaomi Watch S4. The 41 mm Watch S4 is M2502W1 and is a separate product. The standards list covers Bluetooth, NFC and GNSS and has no cellular standard."}},{"url":"https://i02.appmifile.com/791_operatorx_operatorx_xm/05/03/2026/e12c7be544083cc45f26f933fa49ae28.pdf","kind":"manufacturer_pdf","accessed":"2026-10-15","fields":["security_updates_until"],"notes":{"security_updates_until":"UK PSTI statement for M2425W1 dated 2025/2/6: the defined support period is until 3/2/2027. Xiaomi's other PSTI statements use month/day/year, such as 11/15/2026 and 2/27/2028, so this reads as 2 March 2027. This is a security-support period, not an OS-upgrade promise."}},{"url":"https://www.mi.com/global/service/support/declaration.html","kind":"manufacturer_page","accessed":"2026-10-15","fields":["model_numbers"],"notes":{"model_numbers":"Declaration page lists Xiaomi Watch S4 M2425W1 with EU DoC and PSTI documents, separate from Watch S4 41mm M2502W1."}},{"url":"https://www.gsmarena.com/xiaomi_watch_s4-13476.php","kind":"spec_database","accessed":"2026-10-15","fields":["announce_date","wifi","cellular","bluetooth_version","model_numbers","positioning"],"notes":{"announce_date":"Spec page: announced and released 29 October 2024 in China. The global model followed in March 2025.","wifi":"WLAN: No.","cellular":"Versions: eSIM and NFC (China), Bluetooth and NFC (China), Bluetooth only (International). The global page and the EU declaration list no cellular radio, so the global model has no cellular.","bluetooth_version":"Bluetooth 5.3, A2DP, LE.","model_numbers":"Spec page lists models M2424W1 and M2425W1. Only M2425W1 is documented for the global model, so M2424W1 is not stored.","positioning":"Positioning: GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS."}},{"url":"https://www.gsmarena.com/xiaomi_watch_s4_review-news-67715.php","kind":"review_site","accessed":"2026-10-15","fields":["battery_life_measured"],"notes":{"battery_life_measured":"Reviewer used AOD, notifications, a one-hour daily workout and sleep tracking. The most was three days when the watch nearly died, and two days was a consistent result. Stored as about 48 hours. Firmware and display brightness are not stated."}},{"url":"https://teamplush.by/en/?p=64414","kind":"retailer","accessed":"2026-10-15","fields":["positioning","operating_temperature_c","sar_eu_limb_w_kg","nfc","bluetooth_version","wifi"],"notes":{"positioning":"Reseller page reproducing the M2425W1 manual regulatory table: GPS L1 / Galileo E1 / GLONASS G1 / BDS B1I, B1C / QZSS L1 at 1559-1610 MHz, and GPS L5 / Galileo E5a / BDS B2A / QZSS L5 at 1164-1215 MHz. This agrees with the maker's L1+L5 claim and GSMArena. Xiaomi's own manual PDF was not found, so the reseller copy is the source.","operating_temperature_c":"Same reseller copy of the manual: working temperature -10 to 45 C.","sar_eu_limb_w_kg":"Same reseller copy: maximum SAR on the wrist 0.232 W/kg with no gap, against a 4.0 W/kg wrist limit averaged over 10 g, under the EU declaration. The near-mouth value of 0.132 W/kg is a body value and is not stored.","nfc":"The copied regulatory table lists an NFC operating frequency of 13.56 MHz.","bluetooth_version":"The copied table lists Bluetooth 5.3 at 2400-2483.5 MHz.","wifi":"The copied radio table lists only GNSS, Bluetooth and NFC, with no Wi-Fi radio."}},{"url":"https://www.fonearena.com/blog/447624/xiaomi-buds-5-pro-watch-s4-electric-scooter-5-max-price-global.html","kind":"press","accessed":"2026-10-15","fields":["release_date","launch_price_eur","markets"],"notes":{"markets":"Euro price from European announcement coverage. The global launch was at MWC 2025.","release_date":"Article dated 2 March 2025: the Watch S4 was introduced at MWC 2025 for global markets. The first release was in China in October 2024.","launch_price_eur":"Price 159.99 euros for the Watch S4. The article lists no colours and gives no tax treatment. Retail listings put the Rainbow edition at 169.99 euros, which is not a launch price and is not stored."}},{"url":"https://www.euronics.ee/en/phones/watches/smart-watches/bhr9195gl/xiaomi-watch-s4-black-smart-watch","kind":"retailer","accessed":"2026-10-15","fields":["model_numbers","fitness_features","variants"],"notes":{"model_numbers":"Retailer product code BHR9195GL for the black Xiaomi Watch S4, 44.5 g, 486 mAh, Bluetooth 5.3, 4G No.","variants":"Black product code BHR9195GL.","fitness_features":"Retailer spec tab lists maximal oxygen uptake (VO2 max) measurements as Yes."}},{"url":"https://pood.datafox.ee/xiaomi-s4-smartwatch-black/","kind":"retailer","accessed":"2026-10-15","fields":["gtins"],"notes":{"gtins":"Black BHR9195GL, EAN 6941812732403."}},{"url":"https://pood.datafox.ee/xiaomi-watch-s4-rainbow-smart-watch","kind":"retailer","accessed":"2026-10-15","fields":["gtins","model_numbers"],"notes":{"gtins":"Rainbow BHR9199GL, EAN 6941812711668.","model_numbers":"Rainbow product code BHR9199GL."}},{"url":"https://www.achatmoinscher.com/comparateur-de-prix-Montre-connectee-sportive/montre-intelligente-xiaomi-s4-bhr9197gl-gris-argente-6941812707432.html","kind":"retailer","accessed":"2026-10-15","fields":["gtins","model_numbers"],"notes":{"gtins":"Silver BHR9197GL, EAN 6941812707432.","model_numbers":"Silver product code BHR9197GL."}},{"url":"https://www.gsmarena.com/xiaomi_unveils_smart_band_10_pro_buds_6_sound_play_speaker-news-73032.php","kind":"review_site","accessed":"2026-10-23","fields":["successor"],"notes":{"successor":"GSMArena says the Xiaomi Watch S5 comes as the successor to the Watch S4."}}],"fields_filled":83,"updated":"2026-10-23"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}