Remax USA Bluetooth 4.1, lower power consumption and fastest pairing,it can pair 2 phones at the same time and take or pick up a call from either, Iphone shows Bluetooth battery power,no longer worried about the lack of Bluetooth headset Whether you work or play,Caller ID function instead of the phone and call to remind the steps,To liberate the busy hands,The longest charging 2 hours, 5 hours of talk time or music playback, super long standby 55 hours Boot state,press and hold the multifunction button 2 seconds to release,you can switch to the language