Nolia&reg; Smart Wrist Band Sleep Sports Fitness Activity Tracker Pedometer Bracelet Watch Support IOS 7.0 or above, android 4.3 or above. Bluetooth Version: Bluetooth V4.0+EDR Multifunction: Tracker steps / Distance measurement / Calorie consumption management / Sleep cycle / Time display etc. Note: when the bracelet and phone after synchronization, the system will automatically synchronization time, do not need to be set,no settings options. Note:Reminder / Call rem inder / Message reminder (IOS System unavailable)