Description: 【2 in 1 Audio Receiver and Transmitter】: The 3.5mm Cordless Aux Adapter supports transmit and receive, TX RX mode, and sound card mode, easily and simply upgrade your old speakers or car audio system to a compatible cordless audio. 【Stable Connection】:With upgraded V5.3 technology, the 3.5mm transmitter receiver can reduce power consumption and provide fast and stable transmission, bringing you clearer sound quality, and low latency. 【Multifunctional】:This Audio Transmitter Receiver supports 3.5mm (AUX) and RCA (L/R) audio. And it also supports TF card and U disk playback (receiver mode), just plug in and turn on the speaker to let the music flow. The compact design of this transmitter and receiver saves you space, is plug and play, is easy to carry, and it also has a digital display that can show the mode and volume level. 【Easy to Use】: The Audio Transmitter Receiver Adapter has a built in microphone, allowing you to talk hands free in the car. At the same time, you can quickly adjust the volume. 【Wide Compatibility】:This car transmitter receiver is suitable for devices with a 3.5mm interface, the receiver mode is suitable for car audio, wired speakers, home speakers, speaker amplifiers, headphones, etc., and the transmitter mode is suitable for computers, projection instruments, power amplifier, headphones, speakers, etc., get rid of the limitations of traditional wired speakers and enjoy music. Specification: Scheme: 5.3 EDR, A2DP, HSP, AVRCP Frequency: 2.4GHz-2.48GHz Power supply voltage: DC 5V Size Chart: 6.7cmx5cmx2cm/2.64inchx1.97inchx0.79inch Package Includes: 1 Audio Transmitter Receiver Adapter 1 Remote control 1 3.5mm audio cable 1 RCA audio cable 1 Power cord Note: Please allow slightly errors due to manual measurement and different monitors.