The HUAWEI Band 2 Pro doesnt just provide comprehensive and accurate workout data records (heartbeat, pace, movement distance, calories, speed, and direction) but integrates a professional motion analysis algorithm to help users exercise in a thoroughly scientific way. Professional workout report includes: Distance, Heart rate, Calorie, Pace, VO2 max, training effect, and recovery time advice. The HUAWEI Band 2 Pro also provides scientific sleep tracking and breathing instruction. Waterproof to 50 metres to withstand rain and moisture as well as activities like swimming. Built in gps for precise location data including speed, movement and distance tracking. Doesnt just provide comprehensive and accurate workout data records , but integrates a professional motion analysis algorithm to help users exercise in a thoroughly scientific way. Connectivity 1MB memory. Proprietary operating system. Bluetooth 4.2 connection. Display information 22.4mm OLED screen. Touchscreen. Battery 100mAh battery capacity. Typical usage time of up to 21 days. Low usage time of up to 7 days. 1.5 hour charge. Physical specification Size: medium. Watch size H44, W19.7, D10.3mm. Strap size L114.67, W9.4, . Weight 21g. Features Water resistant. Swimproof. Dust resistant. Read texts. Receive social network notifications. Heart rate monitor. Pedometer. Distance. Accelerometer. GPS. Calories. Sleep. Accessories included: Band,Charging cradle,Charging cable,Quick start guide,Safety information,Warranty card, including charger. Manufacturers 2 year guarantee.