Feature: 1. [Compatible Devices] Bluetooth adapter support multi device use, can be used for Bluetooth connection of various electronic devices, for computers, cell phones, speakers, etc. 2. [Large Range] USB Bluetooth adapter signal is strong, through the wall ability, in the environment without interference can achieve 20m/65.6ft transmission distance. 3. [No Delay] 5.3 Bluetooth adapter, equipped with a high performance chip to ensure stable and high speed signal transmission, rapid response, no delay, no lag. 4. [Gold Plated Plug] This USB Bluetooth transmitter receiver with gold plated plug, plugging resistance, prevent oxidation, longer service life. 5. [Automatic Pairing] Bluetooth dongle transmitter receiver can automatically remember the device, after the first pairing, subsequent computer boot automatically connected. Specification: Item Type: BT Adapter Material: ABS, Alloy Product Size: Approx. 28 x 7 x 15mm / 1.1 x 0.3 x 0.6in BT Version: 5.3 (LMP 12.513) Frequency Range: 2.4GHz (2402-2480MHz) Support Protocol: ADP, HSP, AVRCP, for HID, etc. Operating System: For Windows 8.1 10 11 (Driver Free) Use: Connect Your Computer to Other Products with BT. Package List: 1 x BT Adapter Note: Manual measurement, please allow some errors.