Specifications: Fully compatible with Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0, Bluetooth 4.0 and Bluetooth 4.2 specifications. Comply with Bluetooth 5.0 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 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: NOT suitable for all IOS devices including Mac, compatible with iPad and compatible with iPhone,it can't work in car stereo or TV or Linux !!! 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 Adapter Fully compatible with Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0, Bluetooth 4.0 and Bluetooth 4.2 specifications. Comply with Bluetooth 5.0 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.