Happy M OLED touch Smart Band and Watch  (Black Strap, Size : M)

All-day Activity Tracking: Accurately record all-day activities like steps, distance, calories burned, active minutes and sleep status. Bright Colorful Display and Waterproof: See your daily activity and time on 0.96 inches TFT Display screen. IP67 waterproof allows your washing hands, getting caught in the rain. Heart Rate & Sleep Monitoring: Tracks real-time heart rate automatically & continuously and automatically tracks your sleep duration & consistency with comprehensive analysis of sleep quality data, helping you adjust yourself for a healthier lifestyle. See Calls & 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. Built-in USB Plug: Built-in USB plug makes it easy to charge with any USB block and computer; no charging cable and dock needed; Full charge requires only about 1-2 hours and gives you up to 7 days of working time.