Product Features: 1. 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 the conversion to possible, using convenient lossless codes. 2.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. 3.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. 4.Connect two devices: Support to connect with 3.5mm audio port and 2 audio port at the same time. 5.Wireless Music Streaming: Stereo stream music to non-Bluetooth headphones and speakers. Space-Saving Design: Ultra-compact and for convenient use with a variety of devices. Super Stable Connection: Our Bluetooth audio adapter is fitted 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 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. Auto-Connect:This Bluetooth receiver automatically connect to the last paired Bluetooth device when you turn it on time. Color: Black Material: ABS Package Contents: 1 x main unit 2 x audio cables 1 x charging cable 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.