Driver-free, plug-and-play Compatible with 8.1/10/11, driver-free.Also supports Win7 (driver required for Win7). Not for /for ChromeOs/for Linux/ Plug in and enjoy high-quality wireless Bluetooth audio Wide compatibility Supports simultaneous connection of up to 7 devices including Bluetooth headphones, speakers, Bluetooth mouse, keyboards, Bluetooth controllers, printers, and Android phones Color: Black Material: plastic Package Contents: 1 * USB Bluetooth 6.0 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.