With high-performance Bluetooth 5.1 conversion chip, the signal transmission is more stable and rapid, and it refuses to delay and get stuck. Built-in cancellation and ANC noise cancellation circuit, high-definition sound quality without noise, stable signal. Built-in antenna, reduce signal interference, stable connection without dropping. Barrier-free 10-meter long-distance transmission, strong anti-interference ability and more stable signal transmission. There is no need to plug and play the driver. After the Bluetooth adapter is successfully connected for the first time, it can be automatically connected by turning on the Bluetooth function later. Product Name: Audio Bluetooth Transmitter Bluetooth version: Bluetooth 5.1 Input interface: 3.5mm audio Input voltage: DC/5V Transmission distance: 10 meters Product size: 65 x 26 x 11mm color: Black Material: ABS Package Contents: 1 x Adapter 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.