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 RCA 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 RCA 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 VAORLO Bluetooth car adapter supports broadcasting voice notification from existed navigation App, you don't need to look down the phone to ensure safe driving.5.Wireless Music Streaming: Stereo stream music to non-Bluetooth headphones and speakers. 6.Space-Saving Design: Ultra-compact and lightweight 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 mission and a wide signal range (33 feet). With the 3.5mm AUX port and 2 RCA 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 mitter. So you couldn't use it for your TV, keyboard, mouse.8.Auto-Connect:This Bluetooth receiver will automatically connect to the last paired Bluetooth device when you turn it on the next time.9.3-KEY: Next song/Volume Up, Previous Song/Volume Down, Multifunction Button(MFB)Material:Plasticcolour: Black Package Contents:1 x Bluetooth 5.3 audio receiver1 x USB Cable1 x Audio Cable1 x RCa Cable(Note: Random color, don't accept the specified color.)(Wiring colors ar