Description Highlights 5ATM Water Resistant 50 meters water resistant ,equivalent to water pressure of 50 meters underwater,not only to wear swimming,you can also record the data when swimming,and support open water and swimming pool two modes. 2.5D capacitive touch screen With HD resolution 320 x 300 pixel, uses Corning Gorilla glass material, high quality Reflective display technology The dial is always bright without black screen. Uses reflective display technology, the dial brightness will auto adjust according to the environment, gives you better and more clear eye experience. Ceramic bezel Hand polished polished ceramic bezel reflects the charming luster, the excellent hardness of the ceramic can also protect it from scratch lastingly 316L stainless steel physical buttons With the stainless steel buttons make you more convenient to control,the case used 3D laser carbon fiber texture, make the feeling of watch texture better. 11 kinds of sports patterns Running, walking, outdoor riding, swimming pool, swimming, open water swimming, indoor running, indoor riding, elliptical machines, mountaineering, cross country running, Triathlon.In addition to the daily life of the common sports, there are many challenging project such as cross country run, triathlon and so on. GPS + Glonass Can precisely record your daily movement, mileage, altitude, stride frequency, pace and other professional sports data, help you analyze and improve your sports level. Firstbeat Health Data Tracker Show the core data and promptly remind when you are exercise,after completing the sports of exercise,it will use the firstbeat exercise algorithm to give you a physical exercise datas accroding to your amount of exercise:Maximum oxygen uptake(VO2max), Exercise load(TD), Exercise effect(TE) and Recovery Time. Long time standby for 5 days Ultra-long standby time up to 5 days in the ordinary situation, save the frequent charging trouble. if use the full GPS movement mode, the continuous use of time can reach 35 hours,it totally can complete a hundred kilometers cross-country race. Online pay Support online pay and music,open your QR code and scanned rapidly,make your life more convenient. Phone-Free Music Connect wirelessly to Bluetooth earbuds and enjoy music and media with the internal storage for unencumbered phone-free running. AMAZFIT smartwatch APP2.0 With the new Amazfit V2.0 or Mi Fit,you can connect the app wih the smartwatch,sync data and can look over activity data and exercise in the daily life,,update all the data to your smartphone. Specification Hardware Brand: Amazfit Model: Stratos Available Color: Black Chip: Dual core, 1.2GHz Memory: 512MB + 4GB OS: WOS 2.0 Compacibility: Android 4.4, or above; IOS 9.0 or above phones with BT4.0 Waterproof rating: 5ATM Functions Firstbeat Health Data Tracker : Maximum oxygen uptake(VO2max), Exercise load(TD),Exercise effect(TE), Recovery Time. Other functions: Swimming Mode, Call reminder, Info push, GPS+Glonass, Bluetooth music, Alarm, Remote Control of Mijia Smart Home Devices. Sensor: PPG heart rate sensor, acceleration sensor, gyroscope, geomagnetic sensor, light sensor Motor: Support App: Amazfit 2.0 or Mi Fit Alert type: Vibration Connection     Bluetooth version: V4.0BLE Display     Screen type: 1.34 inch, capacitive Resolution: 320*320 pixel Operating method: Touch screen Battery     Battery type: Lithium polymer Battery capacity: 280mAh Running mode: About 5 days GPS+running mode: About 35 hours Apperance     Dial material: 2.5D Screen Case material: Ceramics Band width: 22 mm Package Contents     1 x Huami Amazfit Smart Watch, 1 x USB Cable, 1 x Charging Dock, 1 x User Manual