Dual-mode support Bluetooth 5.4: More stable transmission and low energy Long distance transmission:Effective use range 10-100 meters File sharing:Allows two-way file transfer between your computer and other devices such as mobile phones Wireless connection: the troubles of wired, use it anytime, anywhere Low power Consumption:Reduce power consumption, energy saving and environmental protection Interface:Full-speed USB 2.0 Bluetooth data rate:Up to 3Mbps System Support:for Windows7,Win8.1,Win10,Win11. Support Profile:Bluetooth Headphones,Bluetooth Speaker,Bluetooth Keyboards/Mice,Android Phone/tablet Colour:Black Material:Plastic Package Contents: 1 * USB Bluetooth Adapter 1 * Antenna 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.