Product information: Transmission range: 10 meters Function: battery display, call function, NFC function, voice control, support for music, multi-point connection Bluetooth Protocol: 5.0 Channel: Stereo How to use: hanging ear Color: black with warehouse, white with warehouse, blue with warehouse, single ear black, single ear white, single ear blue Packing list: Headphone*1, data cable*1, 3 pairs of ear caps*1