This extremely lightweight wireless audio transmitter and receiver is an ideal wireless audio solution for various situations and applications Transmitter mode: wirelessly transmit audio from no Bluetooth TV, home stereo system or CD player to Bluetooth earphones or speakers Receiver mode: Wirelessly transmit audio from a Bluetooth-enabled phone, tablet or computer to a wired stereo, speaker or headset. Simply press the switch to switch between transmitter and receiver modes Use advanced Bluetooth technology and 3.5 mm audio cable (included) to easily connect. Super portable audio streaming power supply The adapter has a powerful wireless audio streaming function. Slide this transmitter and receiver into a backpack or laptop bag for easy carrying Wide compatibility: With the included 3.5mm cable and 3.5mm to 2RCA cable, this receiver transmitter can be widely used in computers, laptops, stereo systems, headphones, smart phones, Mp3, CD players, etc. Specification: Material: ABS Battery: 200mAh Transmission speed: 3Mbps Transmission distance: 10m Input/output connection: 3.5mm Working frequency: 2.4MHz Bluetooth version: 5.0 Size: 4.1cm x 4.1cm x 1cm Key Function: Power on: Press and hold the on/off button until the LED lights up Shut down: press and hold the on/off button until the LED goes out Charging: Use DC-5V charger and micro USB charging cable. The red light is on when charging. When the battery is fully charged, the blue light is on Switch Mode: RX: receiving mode, indicator light: blue LED TX: transmit mode, indicator light: red LED RX Working Mode: Pairing name: BT-10, find BT-10 in the Bluetooth settings of the phone to be paired. During the pairing process, the blue light flashes twice per second. After the pairing is successful, the blue light flashes once every three seconds Operation Manual: Connect one end of the audio cable to the audio input of the speaker, and the other end to the BT-10 audio Confirm that it is in RX mode (flashing blue). Find the pairing name in the Bluetooth settings of the phone: BT-10, click to pair Sending mode: TX mode will automatically search for other Bluetooth receiving devices (such as Bluetooth headsets, Bluetooth speakers, Bluetooth receivers, etc.), the red light flashes twice per second during the pairing process, and the red light flashes once every three seconds after pairing fully