Large HD Touchscreen 1.83-inch TFT-LCD display with 240x284 resolution offers a vibrant and clear visual experience. Bluetooth Calling Supports Bluetooth 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 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 240284 Microphone Support Horn Support Motor Support Flash 128Mb Nor Flash Bluetooth 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 10-90RH non-condensation Storage Temperature -30 to 70 Storage Humidity 5-90RH 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 display1224H Multi-dialSupport cloud dial, wallpaper dial OTA upgrade Bluetooth Calling Frequent contacts Call records Dialpad Bluetooth Connection Bluetooth one-button connection Daily Activity Monitoring Heart rate monitorSleep monitoringPedometer monitoringCalorie monitoringDistance monitoringStress monitoringWear 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 detectionBlood oxygen test all-day blood oxygen testPressure measurement all-day pressure detectionA key measurement Reminder Module Incoming call, Message notification, Ultra Low Battery Reminder, Alarm clock reminder, Walk reminder, Exercise self-recognition reminder, Exercise automatic pauseend reminder, Goal Achievement Reminder, Hand washing reminder, Drink water reminder, Excessive exercise heart rate reminder, Low blood oxygen reminder, High pressure reminder, Womens Health Reminder, Binding Reminder Other Function Modules Remote camera, Womens 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 return to the parent pageWrist liftPut it down App VeryFit