{"data":{"slug":"amazfit-t-rex-ultra-2","type":"smartwatch","brand":"Amazfit","name":"T-Rex Ultra 2","aliases":["Amazfit T-Rex Ultra 2","T-Rex Ultra 2 51mm","W2550GL2N"],"release_date":"2026-02","url":"https://arkivo.dev/smartwatches/amazfit-t-rex-ultra-2","specs":{"series":"T-Rex","model_numbers":["W2550GL2N"],"gtins":["850071618860","6972596109730"],"announce_date":"2026-02-19","status":"available","predecessor":null,"successor":null,"launch_price_usd":549.99,"launch_price_eur":549.9,"markets":null,"colors":["Black Magma"],"manufacturer_url":"https://us.amazfit.com/products/t-rex-ultra-2","spec_sheet_url":null,"manual_url":"https://support.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdf","eprel_registration_number":null,"warranty_years":1,"segment":"outdoor","os_updates_years":null,"security_updates_until":null,"case_sizes_mm":[51],"case_shape":"round","case_material":"mixed","case_material_name":"Case in fiber-reinforced polymer. Bezel, buttons and back panel in Grade 5 titanium","back_material":"Grade 5 titanium","case_dimensions_mm":{"height_mm":51,"width_mm":51,"thickness_mm":14.3},"weight_g":null,"weight_with_strap_g":89.2,"water_resistance_atm":10,"water_resistance_standard":"ISO 22810:2010","ip_rating":null,"dive_rating":"EN13319:2000, ISO 6425:2018, GB/T 18828-2022","dive_max_depth_m":45,"mil_std_810":true,"mil_std_810_tests":null,"operating_temperature_c":{"min_c":-30,"max_c":null},"display_technology":"oled","display_technology_name":"AMOLED","screen_size_in":1.5,"resolution":{"width_px":480,"height_px":480},"pixel_density_ppi":322,"display_area_mm2":null,"touchscreen":true,"refresh_rate_max_hz":null,"refresh_rate_min_hz":null,"brightness_peak_nits":3000,"brightness_min_nits":null,"always_on_display":true,"display_cover_material":"sapphire","display_cover":"Sapphire glass","platform":"proprietary","os_at_launch":"Zepp OS 5","os_skin":null,"os_latest":"Zepp OS 6","compatible_phone_os":["ios","android"],"phone_os_requirement":"Android 7.0 and above, iOS 15.0 and above, with the Zepp App","third_party_apps":true,"voice_assistants":["Zepp Flow"],"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":[64],"heart_rate_sensor":"BioTracker 6.0 PPG biometric sensor (5PD + 2LED)","ecg":null,"spo2":true,"skin_temperature":true,"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":true,"depth_gauge_max_m":45,"water_temperature_sensor":null,"health_features":["continuous_heart_rate","heart_rate_alerts","blood_oxygen_app","hrv","sleep_tracking","sleep_stages","stress_tracking","readiness_score"],"fitness_features":["auto_workout_detection","vo2_max","training_load","recovery_advice","pool_swim","open_water_swim","strength_rep_counting","interval_workouts","route_navigation","turn_by_turn_navigation","trackback","golf_courses","ski_resort_maps"],"sport_profiles_count":187,"dive_modes":["scuba_single_gas","freedive"],"external_sensor_types":["heart_rate_strap","power_meter","speed_cadence","foot_pod","smart_trainer"],"fall_detection":null,"crash_detection":null,"emergency_sos":null,"emergency_siren_db":null,"live_tracking":null,"led_flashlight":true,"positioning":["GPS","GLONASS","Galileo","BeiDou","QZSS","NavIC"],"dual_frequency_gnss":true,"offline_maps":true,"bluetooth":true,"bluetooth_version":"5.2","wifi":true,"wifi_standard":null,"wifi_bands":["2.4ghz"],"cellular":false,"network_technologies":null,"bands_4g":null,"bands_5g":null,"nfc":true,"nfc_payments":true,"payment_services":["Zepp Pay"],"uwb":null,"satellite_connectivity":null,"ant_plus":false,"speaker":true,"microphone_count":null,"calls_on_watch":"phone_only","offline_music":true,"button_count":4,"hardware_buttons":["UP","SELECT","BACK","DOWN"],"crown":"none","rotating_bezel":"none","gesture_controls":null,"battery_capacity_mah":870,"battery_life_claimed":[{"mode":"smartwatch","with_solar":false,"hours":720},{"mode":"heavy_use","with_solar":false,"hours":360},{"mode":"always_on","with_solar":false,"hours":240},{"mode":"gps_dual_frequency","with_solar":false,"hours":50},{"mode":"gps_power_saving","with_solar":false,"hours":90},{"mode":"max_battery_gps","with_solar":false,"hours":177}],"battery_life_smartwatch_claimed_h":720,"battery_life_always_on_claimed_h":240,"battery_life_gps_claimed_h":null,"solar_charging":false,"charging_method":null,"charging_notes":"Magnetic charging head. The box has a charging base that works with USB Type-C but no cable. The store FAQ says a USB-C cable is not supplied.","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":null,"band_width_mm":26,"quick_release":true,"band_compatibility":"26 mm quick release","band_material":"silicone","band_name":null,"band_sizes":[{"size_label":null,"wrist_min_mm":145,"wrist_max_mm":215}],"fcc_ids":null,"sar_limb_w_kg":null,"sar_eu_limb_w_kg":null,"other_certifications":null,"in_the_box":["Smartwatch (including standard strap)","Magnetic charging head (no cable)","Instruction manual"],"charger_in_box":false},"variants":[],"sources":[{"url":"https://us.amazfit.com/products/t-rex-ultra-2","kind":"manufacturer_page","accessed":"2026-10-15","fields":["series","segment","status","manufacturer_url","warranty_years","colors","case_sizes_mm","case_shape","case_material","case_material_name","back_material","case_dimensions_mm","weight_with_strap_g","water_resistance_atm","water_resistance_standard","dive_rating","dive_max_depth_m","mil_std_810","operating_temperature_c","display_technology","display_technology_name","screen_size_in","resolution","pixel_density_ppi","touchscreen","brightness_peak_nits","always_on_display","ambient_light_sensor","display_cover_material","display_cover","platform","compatible_phone_os","phone_os_requirement","voice_assistants","storage_gb","heart_rate_sensor","spo2","skin_temperature","accelerometer","gyroscope","barometer","compass","depth_gauge","depth_gauge_max_m","health_features","fitness_features","sport_profiles_count","dive_modes","external_sensor_types","led_flashlight","dual_frequency_gnss","offline_maps","bluetooth","bluetooth_version","wifi","wifi_bands","cellular","ant_plus","speaker","calls_on_watch","offline_music","button_count","battery_capacity_mah","battery_life_claimed","solar_charging","charging_notes","band_width_mm","quick_release","band_compatibility","band_material","band_sizes","in_the_box","charger_in_box"],"notes":{"series":"Amazfit T-Rex family. The page compares it with the T-Rex 3, T-Rex 3 Pro and T-Rex Dual Solar.","segment":"Amazfit sells it as a rugged outdoor GPS smartwatch in its T-Rex range.","status":"The store lists the single option at 549.99 USD and the add to cart button is active.","warranty_years":"Store footer says 1 Year Warranty. This is the US store.","colors":"Spec table: Black Magma. The store sells one colour and one size.","case_sizes_mm":"One case size, 51 mm. Compare table: case diameter 51 mm.","case_shape":"The display is round and the product images show an octagonal bezel around a round dial. Stored as round, like the T-Rex 3 Pro.","case_material":"Body Material: case in fiber-reinforced polymer. Bezel, buttons and back panel in Grade 5 titanium. Stored as mixed. The marketing text says 51 mm Grade 5 titanium body, which the spec table does not support for the whole case.","case_material_name":"Technical specifications, Body Material row.","back_material":"Technical specifications: back panel in Grade 5 titanium. The press release says titanium bezel and case back.","case_dimensions_mm":"Dimensions without heart rate base: 51 x 51 x 14.3 mm. The UK comparison table gives the same figure. The US comparison table lists a thickness of 15.1 mm without the heart rate sensor, which conflicts with the 14.3 mm in the spec table. The spec table value is stored.","weight_with_strap_g":"Weight (with strap): 89.2 g. The standard silicone strap with a pin buckle. The maker does not publish a case-only weight.","water_resistance_atm":"Water-resistance grade 10 ATM. Note 8 says it is rated to ISO 22810:2010 for up to 100 m and passed SGS testing.","water_resistance_standard":"Note 8: according to ISO 22810:2010 the watch achieves 10 ATM.","dive_rating":"Note 9 names EN13319:2000, ISO 6425:2018 and GB/T 18828-2022 with report numbers. It also says the watch uses the Buhlmann ZHL-16C decompression model.","dive_max_depth_m":"FAQ: certified for diving and supports depths up to 45 m for freediving and recreational scuba diving.","mil_std_810":"Note 1: MIL-STD-810H-2019 data comes from report H202512228939-01EN. The tested methods are not listed.","operating_temperature_c":"Low Temperature Mode keeps essential functions responsive down to -30 C. It is off by default and switches on when the watch surface is below -10 C (note 10). No upper limit is published.","display_technology_name":"Display Material: AMOLED.","screen_size_in":"Size: 1.5 inch.","resolution":"Resolution 480 x 480.","pixel_density_ppi":"PPI 322 as published.","touchscreen":"The spec table row labelled Touchscreen names sapphire glass. The manual describes tap and swipe gestures, so touch is confirmed there.","brightness_peak_nits":"Peak brightness up to 3,000 nits. Note 17: not supported in low temperature mode or when battery is below 30%, and needs automatic brightness.","always_on_display":"Battery table lists an AOD mode figure. The manual describes Settings > Display > Always On Display.","ambient_light_sensor":"Sensors, Movement: ambient light sensor.","display_cover":"Screen material: sapphire glass. The Touchscreen row of the spec table also says sapphire glass.","platform":"Zepp OS, Zepp Health's own operating system.","compatible_phone_os":"Supported devices: Android 7.0 and above, iOS 15.0 and above. Application: Zepp App.","phone_os_requirement":"Supported Devices and Application rows.","voice_assistants":"AI assistant: Zepp Flow, in select countries and regions. Note 11 lists the supported languages.","storage_gb":"Storage (note 18): Total 64 GB. Available 26.7 GB for maps, music, mini programs, records and watch faces because the system uses the rest. The total is stored.","heart_rate_sensor":"Sensors, Health: BioTracker 6.0 PPG biometric sensor (5PD + 2LED).","spo2":"24H monitoring and manual blood-oxygen saturation. Not a medical device (note 13).","skin_temperature":"24H monitoring lists skin temperature (thermometer).","compass":"Outdoor tools list Compass and the movement sensors include a geomagnetic sensor.","depth_gauge":"Dive tracking shows time and depth. The manual states the maximum measurement depth.","depth_gauge_max_m":"Manual: maximum measurement depth 45 m. The page says dives up to 45 m.","health_features":"24H heart rate, blood oxygen and stress, abnormal high and low heart rate alerts, sleep heart rate variability, sleep stages including REM, and HybridCharge energy intelligence with BioCharge. The software notes mention a Readiness app. Not a medical device.","fitness_features":"Smart recognition of 8 sports movements, VO2 Max (note 12), Training Load, recovery, pool and open-water swim, strength training with recognition of 25 movements, interval training via the watch, offline maps, turn-by-turn directions, direct return navigation, 40,000+ golf course maps and ski resort maps. Ground contact time and vertical amplitude are named in the marketing copy but not stored because the page does not say whether they need an external sensor.","sport_profiles_count":"Sports Features row: 187 sports modes. Marketing copy says 180+.","dive_modes":"Pro-grade waterproofing: recreational scuba diving and freediving with automatic dive detection. Note 9: Buhlmann ZHL-16C decompression model. The manual says no mixed-gas diving.","external_sensor_types":"Peripherals: heart rate belt, running power meter, Stryd foot pod, cycling power meter, cycling speed and cadence sensors. The September 2026 software notes add FTMS indoor bike trainers and rowing machines. Note 15: only BLE devices are supported.","led_flashlight":"Flashlight with 4 white levels, 1 green mode and Boost Mode.","dual_frequency_gnss":"Positioning: dual-band positioning and 6 satellite positioning systems with a circularly-polarized GPS antenna.","offline_maps":"Navigation and maps: offline maps supported. Full-colour base maps are preloaded.","bluetooth":"Connection: Wi-Fi 2.4 GHz, Bluetooth 5.2, BLE.","bluetooth_version":"Connection row: Bluetooth 5.2, BLE.","wifi":"Connection: Wi-Fi 2.4 GHz. OTA update via Wi-Fi is supported.","wifi_bands":"Connection row lists 2.4 GHz only.","cellular":"Connection lists Wi-Fi 2.4 GHz, Bluetooth 5.2 and BLE only. No cellular radio is listed.","ant_plus":"Note 15: peripheral connections only support BLE devices. ANT+ is not listed.","speaker":"Mic and Speaker: Support.","calls_on_watch":"FAQ: the watch supports Bluetooth phone calls and texts. Calls use the paired phone.","offline_music":"Music Storage: Support. The manual says local mp3 files play through the speaker.","button_count":"Buttons: 4.","battery_capacity_mah":"Battery Capacity: 870 mAh (rated value).","battery_life_claimed":"Typical use up to 30 days (720 h, note 7 scenario). Heavy use up to 15 days. AOD mode up to 10 days, tested with the heavy-use workload and AOD on. Accurate GPS up to 50 h with heart rate on and dual-frequency, all satellites. Power-saving GPS up to 90 h, single frequency. GPS Max Battery Life 177 h, only in Hiking and Climbing modes with heart rate, Bluetooth and wrist raise off. Not stored: trail running normal 44 h and heavy 30 h, low temperature mode 40 h with GPS and 32 days without, since the schema has no mode for them.","solar_charging":"Compare table: solar charging not supported.","charging_notes":"Packing list: magnetic charging head (no cable). What's in the Box: charging base (USB Type-C compatible) but no cable. FAQ: no USB-C cable included.","band_width_mm":"Strap width 26 mm.","quick_release":"Compare table: strap attachment 26 mm quick release.","band_compatibility":"Compare table: strap attachment 26 mm quick release.","band_material":"Strap materials: silicone. Buckle: classic pin buckle.","band_sizes":"Min. and max. wrist dimensions: 145-215 mm.","in_the_box":"Packing list verbatim.","charger_in_box":"The packing list has a charging head and no USB cable or power adapter."}},{"url":"https://us.amazfit.com/products/t-rex-ultra-2.json","kind":"manufacturer_page","accessed":"2026-10-15","fields":["model_numbers","gtins"],"notes":{"model_numbers":"Store feed variant SKU W2550GL2N for the single option.","gtins":"US store feed barcode 850071618860. The German store feed carries 6972596109730 under its own SKU TREXU2-C1207005003."}},{"url":"https://uk.amazfit.com/products/t-rex-ultra-2","kind":"manufacturer_page","accessed":"2026-10-15","fields":["os_at_launch","nfc","nfc_payments","payment_services"],"notes":{"os_at_launch":"The UK comparison table lists OS Zepp OS 5 for the T-Rex Ultra 2.","nfc":"Zepp Pay text: integration of NFC technology. The usage scenarios also count NFC card swipes.","nfc_payments":"Zepp Pay binds up to eight bank cards for password-protected contactless payment. Note 16: supported by Curve and participating issuer banks in 31 European countries. The US page does not mention Zepp Pay.","payment_services":"Zepp Pay, via Curve and participating issuer banks in 31 European countries."}},{"url":"https://de.amazfit.com/products/t-rex-ultra-2.json","kind":"manufacturer_page","accessed":"2026-10-15","fields":["launch_price_eur"],"notes":{"launch_price_eur":"The German store lists 549.90 EUR including VAT. It matches the nextpit list price. The German price is stored as the euro launch price."}},{"url":"https://support.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdf","kind":"manual","accessed":"2026-10-15","fields":["touchscreen","hardware_buttons","crown","rotating_bezel","third_party_apps","depth_gauge_max_m","fitness_features","manual_url"],"notes":{"touchscreen":"Commonly used gestures and buttons: tap and swipe on the screen.","hardware_buttons":"UP, DOWN, upper right SELECT and lower right BACK. Press and hold UP turns the flashlight on.","crown":"No crown is described. Controls are four buttons and the touchscreen.","rotating_bezel":"No rotating bezel is described.","third_party_apps":"App installation: more apps install from the app store in the Zepp App.","depth_gauge_max_m":"Diving Technical Specifications: maximum measurement depth 45 m / 147.6 ft, accuracy per EN13319.","fitness_features":"Return to the starting point: straight line return or Backtrack along the route already travelled, which is the trackback option.","manual_url":"Amazfit T-Rex Ultra 2 user manual, global version."}},{"url":"https://www.zepp.com/press-release/amazfit-announces-the-t-rex-ultra-2-a-titanium-gps-watch-engineered-for-the-extreme","kind":"press_release","accessed":"2026-10-15","fields":["release_date","announce_date","launch_price_usd"],"notes":{"announce_date":"Press release dated 19 February 2026.","release_date":"Available for purchase from 19 February 2026 on Amazfit.com and Amazon.","launch_price_usd":"549.99 USD in the US. Prices exclude sales tax."}},{"url":"https://www.nextpit.de/smartwatches/amazfit-t-rex-ultra-2","kind":"spec_database","accessed":"2026-10-15","fields":["launch_price_eur"],"notes":{"launch_price_eur":"UVP 549.90 EUR including VAT."}},{"url":"https://www.computerwoche.de/article/4171180/amazfit-t-rex-ultra-2-im-test-grose-starke-und-robuste-outdoor-smartwatch.html","kind":"review_site","accessed":"2026-10-15","fields":["positioning","nfc"],"notes":{"positioning":"The test names the six systems as GPS, GLONASS, Galileo, BeiDou, QZSS and NavIC with dual-band GNSS. The maker states six systems and does not name them. Signal bands are not stored.","nfc":"The spec table lists NFC (Zepp Pay). In Germany payment works only through the third party Curve."}},{"url":"https://gadgetsandwearables.com/2026/07/22/amazfit-t-rex-3-pro-ultra-2-zepp-os-6-update/","kind":"press","accessed":"2026-10-15","fields":["os_latest"],"notes":{"os_latest":"Article of 22 July 2026: Zepp OS 6 starts rolling out to the T-Rex 3, T-Rex 3 Pro and Ultra 2."}}],"fields_filled":91,"updated":"2026-10-16"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}