Product details of Bingo Y5 Smart Wirstband Bluetooth Smart Bracelet Battery: 90mAh Li Battery Standby Time: 160 hours Charging duration: 1-2h Bluetooth: Bluetooth 4.0 Touch Screen: Capacitive touch 0.96 inch Sensor: Three-axls acceleration sensor keep connected with smartphone through Bluetooth Badn Length: 210mm, fits 4.72" - 7.87" (120mm-200mm) wrist. Touch key and press key operated, Gesture control, turn the wrist lit screen. Heart rate monitor: static and dynamic 2 kinds models. Calculate heart rate accurately by PPG sensor. Time, Heart rate monitor, Pedometer, distance monitor, Calorie monitor, Alarm clock, finding phone, sleep monitor, camera remote capture; Vibration remind: clock alarm, sedentary, calling name display notification, Facebook /twitter /WhatsApp/SMS synchronous notification;