M2 water proof Smart fitness Band compatible with Bluetooth or Heart Rate sensor, It is compatible to devices having Bluetooth version 4.0 and below in smart phones, Tablets and PC’s and also support Android and IOS It has features such as calling function which enables you make a call and disconnect it, you can also send and receive messages through it but only supported to android Phones for which you need to download app SMS: Bluetooth Sync Reminders, SMS Notifications Steps: Record your steps, Refresh the product app every time Waterproof level: IP67, Charge the device fully before first use. SMS: Bluetooth Sync Reminders, SMS Notifications