Multipoint connection transmitter mode supports simultaneous connection of two Bluetooth headsets or Bluetooth speakers Receiver mode enables hands-free calling with built-in microphone for HD audio Bluetooth version 5.0 with A2DP and AVRCP support, integrated battery for power efficiency and extended service life Supports audio devices with 3.5mm audio input for wireless audio reception and transmission; automatically searches for and connects to paired Bluetooth devices Built-in enhanced signal transmission circuit ensures faster and more stable connectivity; auto memory pairing for easier and more convenient operation Bluetooth solution: 5.0, A2DP, AVRCP Operating frequency: 2.4GHz - 2.48GHz Bluetooth transmission range: up to 10 meters Bluetooth reception range: up to 10 meters Charging voltage: DC 5V Battery capacity: 300mAh Working time: approximately 6 hours Bluetooth receiver function: connects to one mobile phone Bluetooth transmitter function: connects to two Bluetooth headsets or speakers simultaneously Color: Black Material: ABS + PC Dimensions: 47.9 x 65.9 x 13.3mm Package includes: 1 x Host device 1 x Audio cable 1 x Charging cable (includes English user manual) Content limited to items listed; other accessories not included Note: Lighting and display settings may cause slight variations in color between the image and the actual item. Measurement tolerance: +/- 1-3cm