Small and exquisite, easy to carry. Plug and play, no need for driver. Directly plug the adapter into the computer USB interface to achieve bluetooth-compatible connectivity When the computer is for Windows 8/Windows 8.1/Windows 10 system, bluetooth-compatible 4.1/4.2/5.0 is automatically compatible and matched. Bluetooth 5.0 dual-mode chip, low power consumption, more stable signals, the transmission distance up to 20m. Item Name: USB Receiver Material: Metal Bluetooth Version: 5.0 Interface Type: USB Maximum Transmission Distance: about 20m Transmission Rate: 10Mbps Working Frequency: 2400MHz Features: Plug and Play, Portable, bluetooth-compatible 5.0 Size: 2.3cm x 1.45cm x 0.53cm/0.91"; x 0.57"; x 0.21"; (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x USB Receiver