Multipoint connection transmitter mode supports simultaneous connection of two Bluetooth headsets/Bluetooth speakersReceiver mode handsfree calling with MIC microphone HDBluetooth chip Bluetooth 5.0, builtin battery, power saving and service lifeSupport audio devices with audio input for wireless audio reception and transmission, automatically search for connected Bluetooth devices to achieve wireless audio transmissionBuiltin enhanced signal transmission circuit, faster and more stable connection, automatic memory connection function, easier operation and more convenient connectionBluetooth solution: 5.0 , A2DP, , AVRCPFrequency: 2.4GHz2.48GHzBluetooth transmission distance 10 metersBluetooth receiving distance 10 metersCharging voltage: DC 5VBattery: 300haoanWorking time: about 6 hoursBluetooth receiving function: connect 1 mobile phoneBluetooth transmitter function: can connect 2 sets of Bluetooth headsets or Bluetooth speakers at the same timeColour:BlackMaterial:ABS+PCSize:47.9x65.9x13.3MMPackage Contents:1*1* audio cable1* 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 picture a little different from the real thing. The measurement allowed error is +/ 13cm.