Model: RBW-W2 intelligent sports bracelet Product color: black and grey Product Size: The main body 39.2X37.3X10.2mm, the total length of the product 246mmProduct weight: gross weight 230g, product weight: 26gCompatible systems: Android4.4 and above and IOS7.1 or later Sensors: KIONIX KX022-1020Shock: Yes (Patch Motor)Waterproof and dustproof: life waterproof (anti-sweat rain water)Screen size: 0.96 inch screen Type: OLED Bluetooth: Bluetooth 4.0Appearance Material: TPF & PC, cover and back cover Battery type: Polymer lithium battery Battery capacity: 100mAhLife time: 30 days Charging method: multi-point clip Charging time: about 1 hour