Universal Buying Smart Bracelet, (TM) Touch Screen Healthy Watch Wristband Bluetooth 4.0 Pedometer Tracking Calorie Sleep Monitor Call Reminder for Android iOS Smartphone Product size: 40.9*20.0*12.5mm or 1.61 * 0.79 * 4.92(inch), Screen: 0.49 inch. Battery Duration 5-10 days, Data Storage: Latest 7 Days Support: IOS7.1 & above, Android 4.4 & above, Bluetooth 4.0 Health Tracker: Heart Rate Monitor, Pedometer, Calories Counter, Distance, Sleep Monitor Single Key: Short Click and Long Press Control; Special Feature: Light on Wrist Up