Connect audio playback devices with speakers, Receive Bluetooth signals and wirelessly Enhanced anti-interference capability And connection stability Bluetooth 5.4 chip,Bring more stable and smooth Connection experience Transmit mode,Connect audio output devices, Transmitting Bluetooth signals, through paired wireless earphones/Bluetooth speakers Multi scenario use More convenient and practical Main parameters of the product Bluetooth version: V5.4 Transmission distance: 8M (unobstructed straight line) Battery standard: 250MA Charging time: about 2 hours Charging voltage: DC 5V Audio output: 3.5MM audio head Audio input: 3.5mm audio head USB Colour:As Shown Material:ABS Package Contents: 1 * Wireless Audio 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.