Upgrade Bluetooth 5.3: This Bluetooth adapter has a faster data transmission speed and a larger amount of data transmission and reception. In addition, the transmission distance is increased and the ability to penetrate walls is also enhanced. Backward Compatibility: This Bluetooth adapter can be compatible with Bluetooth 2.0/3.0/4.0/5.0/5.1 devices, with a Bluetooth 5.3 adapter, you can easily solve all other Bluetooth connection problems. Free Drive, Plug And Play. This Bluetooth 5.3 is driver-free, plug and play. Compatible with for Windows 8.1/10/11. It should be noted that it is not suitable for win7/8, OS, Linux, , TV. Material: Metal+Plastic colour: black Package Contents: 1 x USB Bluetooth 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.