WATER RESISTANT Protected from sweat and splash with IP67 CALLING-BLUETOOTH Receive and call from the FIT22 on Blueooth HIGH POWER BATTERY Battery life up to 6+ days. HEALTH MONITOR Track your heart rate and your blood saturation Compatibility: Apple iOS 12.2 or higher, Android OS 7.0 or higher, Syncing range: Up to 30ft, Music control via Bluetooth Classic on Android and Bluetooth LE on iOS devices.