Features: 1. It has 2 modes(Tx, RX) that can Bluetooth-enable nearly all the Audio devices in your home. 2. 40m Ultra long range - which ensures a stable connection without losing signal wherever you go in your big house. 3. This 2-in-1 Bluetooth 5.0 Audio Adapter comes with Low Latency to virtually eliminate audio-visual lag 4. Support U Dsik play. Power-off memory function. 5. Suitable for any devices(smartphone,earphone,speaker etc) any version of Bluetooth on the market. Specification: Name: Bluetooth Audio Receiver Transmitter Bluetooth Version: V5.0 Material: ABS Working Temperature: -10-55 Degree Power Input: DC 5V Size: 108*65*26mm Frequency: 2.402GHZ-2.480GHZ Transmission rate: 30Mbps Effective working radius: 40m Interfaces: Optical fiber, coaxial. 3.5mm Package: 1 x Bluetooth Audio Adapter 1 x 3.5mm jack to 2 RCA plug cables 1 x USB charging cable 1 x User manual