1. Automatic Power On: Perfect for use in a car or other situations where you want it to turn on automatically when you connect it to 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 at the same time to listen to music, make calls, and more.3. Connect Two Devices: Support for connecting 3.5mm audio port and 2 RCA audio ports simultaneously.4. Hands-Free Calling and Navigation Announcement: Built-in microphone for hands-free calling; a simple button to answer/redial/hang up/reject calls. In addition, the Bluetooth car adapter supports broadcasting 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 various devices.Super stable connection: Our Bluetooth audio adapter is equipped with a 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 stereo systems, home audio, wired headphones/speakers, amplifiers/home theater, etc. Then you can enjoy wireless Hi-Fi music streamingNote: It is only a Bluetooth receiver, not a transmitter. So you cannot use it for your TV, keyboard, mouse.Automatic connection: When you power 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 button (MFB)Bluetooth protocol: AVRCP, A2DPFrequency range: 2400-2483.5MHzFrequency range: 20Hz-20kHzPower: 28mW RL=16ohmSignal-to-noise ratio: 90dBTotal harmonic distortion: 0.1%Support: , AACForward transmission distance: 10m/33ftProduct size 78x50x18 (mm)Color: BlackMaterial: Metal + PlasticSize: Cable: 80cm/2.6ftPackage contents:1 x Bluetooth 5.2 Audio Receiver1 x USB-C Power Supply1 x 3.5mm AUX Audio Cable1 x RCA Cable (Random colors, do not accept the specified color)1 x English manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture to be a little different from the real thing. The allowed measurement error is +/- 1-3 cm.