Prettyui 2-in-1 USB TV Computer Applicable Bluetooth 5.0 Receiver Transmitter Car Adapter: Specifications Model: KN321 Technologies: BT5.0, A2DP, AVRCP (receiver mode only) Operation Range: Up to 10m / 33ft (without any blocking objects) Pairing name: KN321 Charging Time: 2 hours Battery Type: Li-Polymer (200mAh) Dimensions: 44 × 44 × 12mm Weight: 18g Package Content 1 x Bluetooth 5.0 Audio Transmitter/Receiver Adapter 1 x Micro USB Power Cable 1 x RCA Cable 1 x 3.5mm Aux Cable 1 xMultilingual instruction manual How to use: 1) Plug one end of the audio cable into the audio output of thedevicesand the other end into the audio of the KN321. Confirm that it is in TX mode (red light flash). The KN321 will automatically search for Bluetooth headset or Bluetooth speaker pairing. This extremely portable, lightweight wireless audio transmitter & receiver is an ideal wireless audio solution for a wide range of situations and uses Transmitter mode：wirelessly streams audio from your non-Bluetooth TV, home stereo system, or CD player to your Bluetooth headphones or speakers Receiver mode：wirelessly streams audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones Switch between transmitter and receiver modes with the simple flick of a switch. Effortlessly connect using advanced Bluetooth technology and 3.5mm audio cable (included). Super-Portable Audio-Streaming Power: The KN321 is just 44mm (1.73