Wristband display language:Chinese/EnglishApplication Support Language:Russian,German,Italian,Czech,Japanese,French,Thai,Simplified Chinese,Traditional Chinese,English,Portuguese,Spanish,Korean Note:Wearable devices monitors human activities through electronic sensors,and they are at the consumer electuonics level.It's normal for certain deviation.The user should treat data objectively.--Please do not compared to hospital equipment about reading,it is NOT a medical device--Before using, scan the QR code on the manual to download the app and connect it to the watch with APP. -- For Android user: Please always authorize APP Name: DayBand access to all phone functions and always let it operating on. and please turn on the GPS on your phone before you connect it.--Please charge it for 2-3 hours when you receive it. it was run out of power after the long delivery. Thank youCPU: SYD8810Bluetooth Version: BT 4.0 or aboveCompatible OS: Android 4.4 or above , iOS 8.4 or aboveOperating Mode: Touch KeyWaterproof: IP67Screen Size: 0.96inch TFTResolution: 128*96 pixelsBattery Battery Capacity: 90 mAh Standby Time: About 12 daysUsing time: About 3-5 daysCharging Time: About 2.5 hoursCharging Type: USB chargingPackage Included1 * Smart Bracelet1 * User Manual1 * Retail box