Smart Bracelet, Heart Rate Monitor Wireless Activity Wristband, Black Large New App: Veryfit 2.0. Activities Record: Record daily activities, Checking daily activities including steps, distance and calories consumption in the app. HRM (Hear Rate Monitor): Monitoring your heart rate effectively, an being reasonable to planning the movement. Please tighten the wristband firmly to have the most accurate heart rate number. Remind Alerts: Alarm alert, call alert, Sedimentary alert, etc, by silent vibration. Anti-Lost: When the smart phone is beyond the Bluetooth range (no more than 5m), the device vibrates to remind,Remote Camera Control: Device key could control remote photograph shooting. Sedentary , Palming Recognition. Sleep Monitoring: Device could automatically recognize your status and monitoring the whole sleep progress with analyzing the deep sleep and light sleep hours. IN CASE the "veryfit 2.0" app cannot work properly,PLEASE completely delete the apps and redownload a new "Veryfit 2.0" then start the synchronising,then it should work properly. Compatible with Android 4.4 or higher,iOS 7.1 or higher