Feature: 1. Automatic power on After connecting to the power, it is very good to use in the car or other places where you want to have the automatic power on function. 2. Dual Device Link: Pair your smartphone and tablet at the same time and stream music from anyone to any stereo system that supports standard 3.5mm or RCA jacks. Connect two Bluetooth devices at once to listen to music, make calls, and more. 3. Connect two devices: Support connecting a 3.5mm audio port and 2 RCA audio ports at the same time. 4. Hands-free calling and browsing broadcasts: Built-in microphone for hands-free calling; a simple button to answer/redial/hang up/hang up calls. What's more, the Bluetooth car adapter supports broadcasting voice announcements from existing navigation apps, so you don't have to look down at your phone to ensure safe driving. 5. Wireless Music Streaming: Stream music in stereo to non-Bluetooth headphones and speakers. 6. Space-saving design: Ultra-compact and lightweight, it is convenient to use with various devices. 7. Super stable connection: Our Bluetooth audio adapter is equipped with Bluetooth 5.0 chip, stable pairing, fast transmission speed and wide signal range (33 feet). With a 3.5mm AUX port and RCA port, it can be connected to a non-Bluetooth car audio system, home audio, wired headphones/speakers, a power amplifier/home theater, etc. Then you can enjoy wireless Hi-Fi music streaming! Note: It's just a Bluetooth receiver, not a transmitter. So you can't use it for your TV, keyboard, mouse. 8. Automatic connection: This Bluetooth receiver will automatically connect to the last paired Bluetooth device when it is turned on next time. 9. 3 keys: next song/volume up, previous song/volume down, multi-function key (MFB) 10. Update support for U disk games. Package Included: 1 Bluetooth 5.1 Audio Receiver 1 x 3.5mm auxiliary cable 1 x RCA cable 1 x Type-C charging cable 1 x User Manual