Plustore Heart Rate Monitor, Fitness Activity Tracker Wireless Wristband Health HRM - Monitoring your heart rate effectively, and being reasonable to planning the movement Health HRM - Monitoring your heart rate effectively, and being reasonable to planning the movement See call notifications, daily stats and time of day on the OLED display Remind alerts - Alarm alert, call alert, sedentary alert, etc. By silent vibration Remote camera control - Turn over wrist could control remote photograph shooting. * Does no work First of all, please confirm whether a full charge or not, then press the button for seconds to turn on the bracelet. Or it will no work. * Does no charge please clamp the charging clip to the back 3 point position of bracelet, and be sure the 3 points of bracelet is without any dust. At the moment you successfully charging it, the Green light indicator.