1. Auto-On: Perfect for use in a car or other situations where you want it to automatically turn on when connected 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: Supports connecting 3.5mm audio port and 2 RCA audio ports simultaneously. 4. Hands-Free Calling & Navigation Broadcast: Built-in microphone for hands-free calls; a simple button to answer/redial/hang up/reject calls. The Bluetooth car adapter also supports broadcasting voice notifications from existing navigation apps, so you don't need to look at the phone for safe driving. 5. Wireless Music Streaming: Stream stereo music 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 a wide signal range (10m/33 ft). With 3.5mm AUX port and 2 RCA ports, it can connect non-Bluetooth car audio systems, home audio, wired headphones/speakers, amplifiers/home theaters, etc. Then you can enjoy wireless Hi-Fi music streaming. Note: It is only a Bluetooth receiver, not a transmitter. So you cannot use it for your TV, keyboard, mouse. Automatic Connection: The next time you turn it on, 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, A2DP Frequency Range: 2400-2483.5MHz Frequency Response: 20Hz-20kHz Power: 28mW RL=16ohm Signal-to-Noise Ratio: 90dB Total Harmonic Distortion: 0.1% Support: , AAC Forward Transmission Distance: 10m/33ft Product Size 78x50x18 (mm) Color: black Material: Metal + Plastic Size: cable: 80 cm/2.6 ft Package Contents: 1 x Bluetooth 5.2 Audio Receiver 1 x USB-C Power Adapter 1 x 3.5mm AUX Audio Cable 1 x RCA Cable (random colors, do not accept the specified color) 1 x English Manual Only 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 measurement allowed error is +/- 1-3 cm.