Features 1. Portable wireless audio transmitters and receivers are great wireless audio solutions for every situation. 2. In transmitter mode, streams audio from a non-Bluetooth TV, stereo, or CD player to a Bluetooth headset or speaker; in receiver mode, wirelessly streams audio from Bluetooth-enabled phones, tablets, or computers to wired stereos, speakers, or headsets. 3. Switch between transmitter and receiver modes with a simple button press and easily connect with the latest Bluetooth technology and 3.5mm/0.1in audio cable (included). 4. Boasts a powerful wireless audio streaming capability and is portable, you can put these transmitters and receivers in a backpack or laptop bag and carry them with you everywhere. 5. This receiver transmitter adapter can be widely used in your computer, laptop, stereo, headset, smartphone, MP3 player, CD player, etc. for its extensive compatibility. Specification Condition: 100% Brand New Item Type: Bluetooth 5.0 Audio Transmitter Receiver Color: As picture shown Length: Approx. 44mm/1.7in Width: Approx. 44mm/1.7in Height: Approx. 12mm/0.5in Weight: Approx. 78.0g/2.8oz Model: KN321 Technology: BT5.0, A2DP, AVRCP (receiver mode only) Operating Range: Up to 10m / 33ft (without any blocking objects) Pairing Name: KN321 Charging Time: 2 hours Battery Type: Li-Polymer (200mAh) Package List 1x Bluetooth 5.0 Audio Transmitter Receiver 1x Micro USB Power Cable 1x RCA Cable 1x 3.5mm Aux Cable 1x User Manual