If you encounter a situation where the watch cannot be charged, please contact customer service, thank you. Function: Blood Pressure Passometer Sleep Tracker Push Message Heart Rate Tracker Blood oxygen Alarm Clock Remote Control Social Media Notifications Message Reminder Call Reminder 1.4inch large screen color screen smart bracelet APP Language: Korean,Russian,Spanish,English,GerAdult,Italian,Japanese,French,Portuguese Specification: Style: Sport Case Material: PLASTIC Waterproof Grade:Life Waterproof IP67 Screen Type: Color LCD Band Detachable: Yes Touch Screen: Yes Compatibility: All Compatible BT: 4.0 Bettery: 180mAh Package include: 1 * Smart bracelet 1 * User Adultual 1 * Retail box Note: Wearable devices monitors huAdult 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 equipAdultt about reading,it is NOT a medical device! --Before using, scan the QR code on the Adultual to download the app and connect it to the watch with APP. 1. Support Bluetooth 4.0, Android 4.4 +, IOS 8.0 + Note: Dear buyers, this watch does not require a charging cable, it can be charged directly through the charging head or USB interface (the charging head is not included)