Specifications: Parameters Color Black Material Watch: Metal Mirror Surface Case Band: Silica Gel Size 251 x 26.6 x 15.6mm Technical Parameters Screen Display 0.96 TFT Touch Screen Screen Resolution 160*80 pix Battery Bracelet battery: 160m Ah Headphone battery: 35m Ah Chip Heart Rate Chip:HRS3300 Headphone Chip:RTL 8763BFRbluetooth BT5.0 Compatible OSAndroid 4.4above, IOS 8.2above Waterproof IPX5 waterproof Features Language Speci Function LT04 wireless earbud smart bracelet, Bluetooth camera, alarm clock, Lift your wrist to wake up the screen, change the dials Reminder Function Bluetooth calls, Answer calls & recall last one call. Support for Siri. Call/message reminder, social message reminder (Whatsapp, We Chat, QQ, Facebook, Twitter, etc.) Health Funciton Heart rate monitoring, Blood pressure monitor, Blood oxygen monitor, Sleep monitoring, Sedentary reminder. Sports Funciton Step / calorie / distance, multi-sport mode, sports track record, data sync with the phone when connecting Language Watch display language: Chinese (simplified, traditional), English APP language: Chinese (simplified, traditional), Japanese, English, French, German, Italian, Spanish, Russian, Portuguese, Korean APPKaka Fit Warm Tips:- After receive the watch, please charging first. Because after a long period of logistics, the watch has a low battery- Before using, scan the QR code on the manual to download the app & connect it to the watch with APP.- Although the bracelet can monitor your heart rate, it cannot be used for any medical purpo