Bluetooth Version: Bluetooth 4.0 APP Name:Wearfit 1.0 APP supports languages:English, Japanese, Simplified Chinese, Traditional Chinese, French, German, Russian, Romanian Waterproof Rating : IP67 Screen type: OLED Screen size:1.3inch Compatability: Android 4.4 / iOS 8.5+ Battery Type: Lithium Polymer Battery Battery Capacity: 180mAh Power: Built-in Battery Standby time: 10-60Days Shape of the dial: Rectangle Case material: PC Band material: Silica Weight:37g Package Contents: 1 x Smart Bracelet, 1 x Manual ,1x charger Instructions for the first user : 1.When using this equipment for the first time, The smart watch battery has no power ,please take out the device , charger it first 2?the charging clip caught on the host of the smart bracelet during the charging ,the palping foot on the charging lip align to the palping foot on the main body . 3?The screen will have light and in clock screen when touch button be clicked . single click can switch different pages .the screen will out of light when no action happened after 6 seconds. 4?IP67 waterproof means that stepping depth doesn't exceed one meter and steeping time doesn't exceed 30 minutes