Heypex Wireless Bluetooth Double Twins Earpieces Stereo Music Earphones for All Android, iOS and Windows Device (Random Colour) Heypex Latest Bluetooth version V4.1. support listening to songs and receiving calls, listening to music as stereo. listen to the music can adjust the upper and lower music, each touch once take you into the music age, the volume key is up and down, the volume key is added and reduced volume, the length of 3 seconds to hear the sound is the volume increase. telephone numbers, unregistered callback, full intelligent English voice prompt, boot, pairing, turn off the phone, low power, low voice prompts.millet phone has power display, you can always watch the power consumption of headphones, do not worry about headphones without electricity to let you live without worry.When Bluetooth headset is turned off on a cell phone every time, it will automatically connect to the phone when it turns on the Bluetooth headset. It is more convenient and quicker.intelligent compatibility: support all Bluetooth mobile phone, tablet, notebook, singing bar, QQ music, film and so on, all the mobile phones, no reason can not be connected, rest assured to buy. battery capacity: 75mah transmission distance: 10 meters charge time: 1-2 hours noise reduction: DSP intelligent noise elimination technology built-in HD microphone product sound quality.