Multipoint connection transmitter mode supports simultaneous connection of two Bluetooth headsets/Bluetooth speakersReceiver mode hands-free calling with MIC microphone HDBluetooth chip Bluetooth 5.0, built-in battery, power saving and longer service lifeSupport audio devices with audio input for wireless audio reception and transmission, automatically search for connected Bluetooth devices to achieve wireless audio transmissionBuilt-in enhanced signal transmission circuit, faster and more stable connection, automatic memory connection function, easier operation and more convenient connectionBluetooth solution: 5.0 EDR, A2DP, HSP, AVRCPFrequency: 2.4GHz-2.48GHzBluetooth 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* host1* audio cable1* charging cable(With English manual)Only the above package content, other products are not included.Note: Light shooting 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 +/- 1-3cm.