1. Auto On When you connect to the power, So its very good for to use in car or other you want it have auto on functions. Dual Device Link: Simultaneously pair your smartphone and tablet and stream music from either one with any stereo system that supports a standard 3.5mm or jack.Connect two Bluetooth devices at once to listen to music, make phone calls, and more. 2. Hands-free Calling and Navigation Broadcast: A built-in microphone for hands-free calls One simple button to answer or redial or hang up or reject calls. Besides, the Bluetooth car adapter supports broadcasting voice notification from existed navigation App, you don't need to look down the phone to safe driving. 3. Wireless Music Streaming: Stereo stream music to non-Bluetooth headphones and speakers. Space-Saving Design: Ultra-compact and for convenient use with a variety of devices. 4. Super Stable Connection: Our Bluetooth audio adapter is fitted with a Bluetooth 5.2 chip for steady pairing, fast transmission and a wide signal range (33 feet). With the 3.5mm AUX port and 2 port, it can be connected to non-Bluetooth car audio systems, home stereo, wired headphone or speaker, Amplifier or Home Theater.etc. Then you can enjoy wireless Hi-fi music streaming! 5.Auto-Connect:This Bluetooth receiver will automatically connect to the last paired Bluetooth device when you turn it on time. 3-KEY: Next song or Volume Up, Previous Song or Volume Down, Multifunction Button(). Upgraded to support U Disk play. Content: AUDIO Sound Track: Double Model Number: NEW bluetooth receiver Transmission Distance: 10m or 33ft Charging: Type c Port 5V colour:Black Material:ABS size:78 x 50 x 18mm Package Contents: 1 x Bluetooth 5.2 Audio Receiver Adapter 1 x 3.5mm Aux Cable 1 x cable Only the above package content, other products are not included. Note: Light reflection and different displays may se the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.