Fitness Tracker Waterproof, Activity Tracker Watch with Heart Rate Monitor, Smart Band with Blood Pressure Monitor, Calorie Counter, Sleep Monitor, Pedometer for Kids Women and Men Heart Rate and Sleep Monitoring - Tracks real-time heart rate automatically and continuously and automatically tracks your sleep duration and consistency with a comprehensive analysis of sleep quality data, helping you adjust yourself for a healthier lifestyle. All-day Activity Tracking : Accurately record all-day activities like steps, distance, calories burned, active minutes and sleep status. See Calls and Messages on Your Wrist : Receive call, calendar, SMS and SNS (Facebook, WhatsApp, LinkedIn, Instagram, and Twitter) notifications on display; Never miss the messages that matter. IP67 Waterproof and Built-in USB Plug : Easy to charge with any USB block and computer; No charging cable and dock needed; one single charge gives you up to 7 days of working time. Color Screen and IP67 Waterproof : This watch has all the traditional functions as a fitness tracker, at the same time, it adopts the most popular features in 2018: Color Screen and Slim Design. It also meets the international IP67 waterproof and dustproof standard. Brand: Hexdeer Screen Size: 0.96 inch Bluetooth Version: BT 4.0 Minimum OS requirement: Android 4.4 or above, iOS 8.4 or above Battery Type: Polymem battery Battery Capacity: 80mAh Bracelet Size: 18*43*11 nm Strap Size: Long Strap: 115*18*2 nm; Short Strap: 102*18*2 nm Material: silica gel and plastic Waterproof: IP67. Do not shower or swim with the device. Maximum Operating Altitude: 30000 feet (9114m) Operating Temperature: -4 to 113 F (-20 to 45 C)