1. Auto Power On: Perfect for use in a car or other situations where you want it to turn on automatically when you plug it into a power source. 2. Dual Device Link: Pair your smartphone and tablet simultaneously and stream music from any stereo system that supports standard 3.5mm or RCA jacks. Connect two Bluetooth devices simultaneously to listen to music, make calls, and more. 3. Connect two devices: Support connecting 3.5mm audio port and 2 RCA audio ports simultaneously. 4. Hands-free Calling and Navigation Message: Built-in microphone for hands-free calling; One-button to answer/redial/hang up/reject calls. In addition, the Bluetooth car adapter supports sending voice messages from existing navigation apps, so you don't have to look at your phone for safe driving. 5. Wireless Music Streaming: Stream music in stereo to non-Bluetooth headphones and speakers. Space-saving design: Ultra-compact and lightweight, it is convenient to use with different devices. Super Stable Connection: Our Bluetooth audio adapter is equipped with Bluetooth 5.2 chip (10m/33ft). With 3.5mm AUX port and 2 RCA ports, it can connect non-Bluetooth car stereo, home audio, wired headphones/speakers, amplifier/home theater, etc. Then you can enjoy wireless Hi-Fi music streaming. Note: It is just a Bluetooth receiver. So you can't use it for your TV, keyboard, mouse. Automatic connection: When you turn on next time, this Bluetooth receiver will automatically connect to the last paired Bluetooth device. 3 buttons: Next track/Volume up, Previous track/Volume down, Multi-function (MFB) A2DP Frequency range: 2400-2483.5MHz Frequency range: 20Hz-20kHz Power: 28MW RL u003d 16OHM Signal-to-noise ratio: 90db Total harmonic distortion: 10.0% Support: AAC Support:/> Product size 78x50x18 (mm) Color: Black Material: Metal + Plastic Size: Cable: 80cm /2.6ft Package contents: 1 x Bluetooth 5.2 Audio Receiver 1 x USB-C Power Supply 1 x 3.5m Ax 3.5m Cables (Random colors, do not accept the specified color) 1 x English manual The above package contents only, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.