Specification:  Brand: Xiaomi Amazfit  Bluetooth Version: Bluetooth 4.0  Waterproof: Yes  IP rating: IP68   Functions: Bluetooth calling: Phone call reminder  Messaging: Message reminder  Health tracker: Heart rate monitor,Sleep monitor Operating mode: Press button Type of battery: Lithium-ion polymer battery  Battery Capacity: 190mAh People: Female table,Male table Shape of the dial: Rectangle  Case material: Polycarbonate  Band material: Silicone Product size (L x W x H): 19.5*3.5*0.8cm   Package size (L x W x H): 5*5*5cm  Product weight: 0.0320 kg  Package weight: 0.2070 kg   Main Features: Sleep monitoring: Carefully monitor your sleep quality Heart rate monitor: Considerate monitor contact designed on the behind of the watch, take care of your health anytime and anywhere Bluetooth 4.0: Connected with mobile phone App, stable, fast and super low consumption 1.28 inch with 2.5D Corning Gorilla Glass screen Best suitable screen size with high definition picture displaying gives you great experience   Package Contents:  1 x Smartwatch  1 x Charging Cable