S5, new heart rate technology, measurement accuracy compared to standard medical equipment. Functions: sleep monitoring, motion monitoring, heart rate monitoring, steps, distance, calories, GPS, sedentary reminder, push message, find mobile phone, auto sleep mode, smart wake up, remote self-timer, IP68 waterproof. Multi-Function Health Management: The activity tracker accurately records your daily activity, distance traveled, calories burned and monitors your heart rate with comprehensive analysis. The powerful 8-in-1 activity tracker makes your exercise more efficient and allows you to have a healthier lifestyle. Heart rate monitor. Advanced heart rate sensor for accurate and effective heart rate tracking, monitor your heart rate all day with a graph in the app. This means you can know your heart rate while resting and while exercising. This activity tracker takes care of every heartbeat. Watch calls and messages on your wrist: With a premium LCD screen, the screen intensity is brighter. Receive call, calendar, SMS and SNS (Facebook, WhatsApp, LinkedIn, Instagram and Twitter) notifications on the screen; vibrate to notify you of incoming calls and messages; reminds you to move on after periods of inactivity and important dates, helping you stay connected, never miss the messages that matter IP68 waterproof and long battery life: IP68 waterproof, you can wear a sports watch when washing your hands, taking a bath and swimming (do not dive into the sea). Only takes 1-2 hours to fully charge and lasts up to 7-15 days on standby.