Specifications: Fully compatible with bluetooth-compatible 2.0, bluetooth-compatible 2.1, bluetooth-compatible 3.0, bluetooth-compatible 4.0 and bluetooth-compatible 4.2 specifications. Comply with bluetooth-compatible 5.0 technical specifications, dual mode transmission. Farther transmission distance: 100 meters long transmission distance (no blocking), strong signal. 24Mbps transmission rate, providing stable and high-speed transmission of file and audio data. Intelligent sleep wake-up energy-saving, 24-bit CRC check to resist interference, adaptive frequency hopping to reduce crosstalk. Item Name: bluetooth-compatible Adapter Material: Plastic + Metal Bluetooth Version: 5.0 Interface: USB 2.0 Compatible System: for Windows XP/Vista/Win7/Win8/Win8.1/Win10 Features: Mini, Plug and Play, High Speed, Easy to Carry Size: 13mm x 14mm x 6mm/0.51" x 0.55" x 0.24" (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 bluetooth-compatible Adapter