Product parameters: Chip scheme: Jerry 1. Bluetooth solution: 5.0 EDR, A2DP, HSP, AVRCP 2. Frequency: 2.4GHz-2.48GHz 3. Bluetooth receiving distance ≤ 10 meters 4. Charging voltage: DC 5V 7. Bluetooth receiving function: connect 1 mobile phone 8. Weight: 100g bag 9. Packing size: 90X90X52mm 10. Color: black Product Features: 1. Unique 3D Surround Sound Function: With the 3D audio button, you can switch to 3D mode to enjoy the surround sound with High Fidelity from a normal audio source. Its advanced internal chip takes charge of conversion to enable convenient use of lossless codes. 2. Auto On when you connect the power, so its very good for to use in car or other you want it to have auto on functions. 3. Dual Device Link: Simultaneously pair your smartphone and tablet and stream music from either one with any stereo system that has a standard 3.5mm or RCA jack. Connect two Bluetooth devices simultaneously to listen to music, make calls, and more. 4. Connect two devices: Support to connect with 3.5mm audio port and 2 RCA audio port at the same time. 5.Wireless Music Streaming: Stream stereo 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 equipped with a Bluetooth 5.0 chip for steady pairing, fast transmission 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 Vikefon Bluetooth receiver only, not a transmitter. So you couldn't use it for your TV, keyboard, mouse. 8. Auto-Connection: This Bluetooth receiver will automatically connect to the last paired Bluetooth device when you turn it on next time. 9. Upgrade-KEY Button: Next Track/Volume Up, Previous Track/Volume Down, Multi-Function Button (MFB) 10: Upgraded to support SD card play. 11.Note: No built-in battery, So POWERED BY USB CHARGING. Package Content 1* main unit 1* AUX audio cable 1* RCA audio cable 1* Type-C power cord 1* manual