Attention: Y68 SMART WATCH comes with NO Charger in the package. To charge you remove the straps and insert the metal connectors on the watch to a normal charger port. Please see below photo on how to charge the Watch. Charge the watch first before using it. imageSpecial Features:Heart Rate Monitor Blood Pressure Monitor Blood Oxygen Monitor Sleep Monitor Multi-sport Modes Pedometer Call or Message Reminder Call ID Display Information Push Reminder (SMS/QQ/WeChat/Skype/Facebook/Twitter/Line/WhatsApp) Auto Light-up Screen Alert Type: Vibration Other Functions: Alarm clock , Camera remote control,Anti-lost APP Name: FitproSpecification:CPU: Hs6620D Bluetooth Version: BT 4.0 or above Compatible OS: Android 4.4 or above , iOS 8.0 or above Operating Mode: Single dial Key Waterproof: IP67, Do not support swimming and take a shower. Screen Size: 1.3inch TFT Resolution: 240*240 pixels Battery Battery Capacity: 100 mAh Standby Time: About 7-10 days Using time: About 2-5 days Charging Time: About 2.5 hours Charging Type: USB chargingApp Language:Russian,German,Italian,Czech,Japanese,French,Thai,Simplified Chinese,Traditional Chinese,English,Portuguese,Spanish,KoreanPackage Included1 * Smart watch(No charger in the box ) 1 * User Manual 1 * Charging cable 1 * Retail boxNote: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 Yoho sports 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 you!