1. Auto Power On: Perfect for use in a car or other situations where you want it to have an automatic power on 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 to connect 3.5mm audio port and 2 RCA audio ports at the same time.4. Hands-free calling and navigation broadcast: Built-in microphone for hands-free calling; a simple 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 need to look down at your phone to ensure 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 various devices.Super stable connection: Our Bluetooth audio adapter is equipped with Bluetooth 5.2 chip for stable pairing, fast transmission and wide signal range (10m/33ft). With 3.5mm AUX port and 2 RCA ports, it can connect non-Bluetooth car audio system, home audio, wired headphones/speakers, amplifier/home theater, etc. Then you can enjoy wireless Hi-Fi music streamingNote : It is only a Bluetooth receiver, not a transmitter. So you can't use it for your TV, keyboard, mouse.Automatic connection: When you turn it on next time, this Bluetooth receiver will automatically connect to the last paired Bluetooth device.3 keys : next track/volume up, previous track/volume down, multi-function button (MFB)Bluetooth protocol: AVRCP, A2DPFrequency range: 2400-2483.5MHzFrequency range: 20Hz-20kHz<br> Power: 28mW RL=16ohmSignal-to-noise ratio: 90dBTotal harmonic distortion: 0.1%Support: , AACForward transmission distance: 10m/33ft Product Size 78x50x18 (mm)Color: BlackMaterial: Metal + PlasticSize: Cable: 80cm/2.6ftPackage Contents:1 x Bluetooth 5.2 audio receiver1 x USB-C power1 x 3.5mm AUX audio cable1 x RCA cable (random colors, do not accept the specified color)1 x English manualOnly the above package contents, other products are not included.Note: Light and different screens may cause the color of the item in the picture a little different from the real thing. The permissible measurement error is +/- 1-3 cm.