【Large HD Touchscreen】 1.83-inch TFT-LCD display with 240x284 resolution offers a vibrant and clear visual experience. 【Bluetooth-compatible Calling】 Supports Bluetooth-compatible 5.3 for seamless calling and connectivity with frequent contacts and call records. 【Alexa Integration】 Wake up Alexa with a long press of the physical button for voice commands and local application access. 【Comprehensive Health Monitoring】 Tracks heart rate, blood oxygen, sleep, stress, and supports 100+ sport modes with automatic recognition. 【Long Battery Life】 300mAh lithium polymer battery provides up to 7 days of regular use and 5 days with Bluetooth-compatible calling. Specifications: Waterproof Level: IP68 Screen Size: 1.83" Screen Type: TFT-LCD Screen Cover: Blue glass Bottom Shell Material: Plastic Key: Aluminum alloy Wrist Strap Material: Silicone Charging Contact: Stainless Steel Watch Tongue Clasp: Plastic Watch Dimensions (L x W x H): 273 x 38.99 x 11.37mm Body Dimensions (L x W x H): 46.98 x 38.99 x 11.37mm Watch Weight: 39.2g MCU: ATS3085L Three-axis Sensor: Support PPG Heart Rate Sensor: HX3917 Touch Chip: Support Screen: Full screen touch Screen Resolution: 240*284 Microphone: Support Horn: Support Motor: Support Flash: 128Mb Nor Flash Bluetooth-compatible: BLE5.3 Operating Voltage: 3.8V Battery Capacity: 300mAh Battery Life: 7 days BT Battery Life: 5 days Battery Type: Lithium polymer Charging Mode: Magnetic contact charging Charging Time: Within 2.5 hours iOS: iOS 9.0+ Android: Android 6.0+ Operating Temperature: -20℃ to 50℃ Charging Temperature: 0℃ to 50℃ Working Humidity: 10%-90%RH (non-condensation) Storage Temperature: -30℃ to 70℃ Storage Humidity: 5%-90%RH (non-condensation) Wake up with Alexa: Wake up Alexa by long pressing the physical button; you can wake up Alexa through the icon icon Voice Input: Enter the listening interface for voice input Alexa Service: Some local applications such as weather, news, and local alarm clock can be opened through Alexa Language (Regular): 9 countries: Britain, Germany, Spain, Italy, Japan, Russia, Portugal, and Netherlands, default English Font: 9 countries: Britain, Germany, Spain, Italy, Japan, Russia, Portugal, and Netherlands, default English Basic Function Module: Clock, date display/12/24H; Multi-dial/Support cloud dial, wallpaper dial; OTA upgrade Bluetooth-compatible Calling: Frequent contacts; Call records; Dialpad Bluetooth-compatible Connection: Bluetooth-compatible one-button connection Daily Activity Monitoring: Heart rate monitor/Sleep monitoring/Pedometer monitoring/Calorie monitoring/Distance monitoring/Stress monitoring/Wear detection Exercise Function: Running outdoors, Indoor running, Outdoor walk, Indoor walk, Outdoor riding, Indoor cycling, On foot, Cricket, Swimming pool, Open swimming, Yoga, Pilates, Dance, Rowing machine, Elliptical machine, Core training, Functional strength training, High intensity interval training, Tidy up and relax, Fitness, Supports 100 motion types, Sports automatic recognition Autonomous measurement module: Heart rate measurement (all-day heart rate detection)/Blood oxygen test (all-day blood oxygen test)/Pressure measurement (all-day pressure detection)/A key measurement Reminder Module: Incoming call, Message notification, (Ultra) Low Battery Reminder, Alarm clock reminder, Walk reminder, Exercise self-recognition reminder, Exercise automatic pause/end reminder, Goal Achievement Reminder, Hand washing reminder, Drink water reminder, Excessive exercise heart rate reminder, Low blood oxygen reminder, High pressure reminder, Women's Health Reminder, Binding Reminder Other Function Modules: Remote camera, Women's Health Tracking, Weather, Music control, Stopwatch, Alarm clock, Timer, Flashlight, Find the phone, Power saving mode, Vibration drainage, Restore factory settings, Wearing detection, Restart, Sweep Code Binding, Brighten screen duration setting, Firmware Information Gesture: Slide right to retu