Hot Y5 Smart Wristband Sleep Tracker Watch Color Screen Electronics Fitness Tracker Bracelet Heart Rate Monitor PK mi band 3 2 Key features: • Heart rate monitor • Blood pressure monitor • Blood oxygen monitor • Sleep monitor • Pedometer • Distance • Calories • Sport mode • Sedentary reminder • Call reminder • Alarm clock Specifications: • Model: Y5 • Color: Black, light blue, dark blue, purple, red • Compatible OS: Android 5.1, iOS 8.0 or above • Operating mode: Single touch • Bluetooth version: 4.0 • APP language: Chinese, English, Japanese, Korean, French, German, Russian, Polish, Spanish • Size: 40.4 x 20.1 x 10.5 mm (1.59 x 0.79 x 0.41 in) • APP: JYOU • Screen size: 0.96-inch color screen • Battery capacity: 90 mAh • Band material: Stainless steel + TPU • Length: 120 – 210 mm (4.72 - 8.27 in) 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.