One click switch for receiving/transmitting A regular speaker can be instantly converted to a Bluetooth speaker and connected to a 3.5mm audio interface. Even speakers without Bluetooth function can play wirelessly Instant Bluetooth TV with wireless connection via Bluetooth earphones for easy drama tracking without disturbing people Dual interface design of 3.5+2RCA dual audio port according to mode input/output, suitable for more devices Lossless sound quality with zero delay Function introduction: receiving, transmitting, USB drive Supports type-c interface 5V power supply Transmission distance: Less than 10 meters Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:Black Material:ABS Package Contents: 1x line 1x adapter 1x 3.5mm audio cable 1x 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.