Product Features: 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. 2.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. 3.Connect two devices: Support to connect with 3.5mm audio port and 2 audio port at the same time. 4.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. 5.Wireless Music Streaming: Stereo stream music to non-Bluetooth headphones and speakers. 6.Space-Saving Design: Ultra-compact and for convenient use with a variety of devices. 7.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 vaolro Bluetooth receiver only, not a transmitter. So you couldn't use it for your TV, keyboard, mouse. 8.Auto-Connect:This Bluetooth receiver automatically connect to the last paired Bluetooth device when you turn it on time. 9.3-KEY: Next song/Volume Up, Previous Song/Volume Down, Multifunction Button() Material:Plastic colour: Black Package Contents: 1 x Bluetooth 5.3 audio receiver 1 x USB Cable 1 x Audio Cable 1 x Cable(Note: Random color, don't accept the specified color.) (Wiring colors are shipped randomly, no specification is accepted) Only the above package content, other products are not included. 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.