Multipoint connection transmitter mode supports simultaneous connection of two Bluetooth headsets/Bluetooth speakers Receiver mode hands-free calling with MIC microphone HD Bluetooth chip Bluetooth 5.0, built-in battery, power saving and service life Support audio devices with audio input for wireless audio reception and transmission, automatically search for connected Bluetooth devices to achieve wireless audio transmission Built-in enhanced signal transmission circuit, faster and more stable connection, automatic memory connection function, easier operation and more convenient connection Bluetooth solution: 5.0 , A2DP, , AVRCP Frequency: 2.4GHz-2.48GHz Bluetooth transmission distance ≤ 10 Bluetooth receiving distance ≤ 10 Charging voltage: DC 5V Battery: 300haoan Working time: about 6 hours Bluetooth receiving function: connect 1 mobile phone Bluetooth transmitter function: can connect 2 sets of Bluetooth headsets or Bluetooth speakers at the same time Colour:Black Material:ABS+PC Size:47.9x65.9x13.3MM Package Contents: 1* 1* audio cable 1* charging cable(With English manual) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.