Fitness Tracker for Men and Women - Green Blood Pressure Smartwatch Heart Rate Product Details: Heart rate, blood pressure, blood oxygen, distance, calories, sedentary, alarm clock, Clock, sleep monitoring, Find phone, find watch, motion gesture Mat0r vibration Message notification: QQ, Faceb00k, Whatsapp, Twitter, Skype, App Wechat, Instagram Language: Chinese, English, Spanish, French, Dutch, Portuguese, German, Russian, Turkish, Japanese, Persian, Arabic, Malaysian, Thai. Description: Battery capacity: 150mAh Battery capacity material: silicone Body memory: 258MB Usage: wristband Operation method: touch Interface: USB 3.0 Wireless distance: 5m (inclusive) -10m (inclusive) Communication function: not supported Wristband material: silicone Applicable to: Universal compatibility with mobile phone versions: i0s8.0 and android 4.4 mainly BT version: 4.0 Display: 1.44 inch color screen Size: 43.5 * 36 * 12.3mm Screen: 240 * 240 resolution Charging port: USB charging port Waterproof grade: IP67 Button: One-button 0LED Type: Stop Color: black, pink, white, gray, green, dark blue, light blue, yellow How to charge? You just need to plug this watch into any USB (note that you can plug this watch in two ways but it will only charge in one way, so please try both) Package includes: 1 x Smartwatch with box 1 x User Manual