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Screen Material: AMOLED Battery Detachable: No Band length[mm]: 260 Band width[mm]: 22 Resolution: 360*360 Battery capacity: 240mAh Headphone battery capacity: 25mAh Compatible systems: Android 4.4 and above;IOS 8.0 and above Display Size: 1.39inch Network Mode: None Rear Camera: None Metrics measured: Heart Rate Monitor,Blood Oxygen Monitor,Sleep Monitor,Blood Pressure Monitor Activity Tracked: Steps Tracker,Distance Tracker,Calorie Tracker,Activity Tracker Language: English,Russian,Spanish,POLISH,Turkish,Italian,French,German,japanese,UKRAINIAN,Dutch,Arabic,Indonesian,Greek Earphone touch button function 1.4 times of keystrokes before pairing - Chinese and English switch; 2.Press for 2S to turn on, 1.5S to reject the call, 3S to turn off; 3.Double-click the key ---Answer/hang up the call; 4.4 times of keystrokes - wake up SIRI; 5.Double click the key - Play/Pause; 6.Triple click on the left: Previous，Triple click on the right: Next； 7.Reset the headset to original settings: Disconnect the phone from the headset, take out the headset from the watch, quickly double-tap and hold the headset touch area for 5 seconds.(If the headset can't paired, can restore the original factory to pairing)