Product Features: 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.<br> Connect two devices: Support to connect with 3.5mm audio port and 2 audio port at the same time.<br> Hands-free Calling & Navigation Broadcast: A built-in microphone for hands-free calls; One simple button to answer/redial/hang up/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.<br> Wireless Music Streaming: Stereo stream music to non-Bluetooth headphones and speakers.<br> Space-Saving Design: Ultra-compact and for convenient use with a variety of devices.<br> <br> Super Stable Connection: Our Bluetooth audio adapter is fitted with a Bluetooth 5.3 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/speaker, Amplifier/Home Theater.etc. Then you can enjoy wireless Hi-fi music streaming! Note: It's a Bluetooth receiver only, not a transmitter. So you couldn't use it for your TV, keyboard, mouse.<br> Auto-Connect:This Bluetooth receiver will automatically connect to the last paired Bluetooth device when you turn it on time.<br> 3-KEY: Next song/Volume Up, Previous Song/Volume Down, Multifunction Button()<br> Note: No built in battery,So POWERED BY USB CHARGING.<br> Color: Black<br> Material: plastic+metal<br> <br> Package Contents:<br> 1 x Bluetooth adapter<br> 1 x 3.5mm audio cable<br> 1 cable<br> <br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.