Approx USB 2.0 Nano Receptor. Connectivity technology: Wireless, Host interface: USB, Interface: Bluetooth. Data transfer rate (max): 3 Mbit/s. Chipset: ISSC, Bluetooth version: 2.1+EDR, Maximum operating distance: 20 m. Width: 12.3 mm, Depth: 22 mm, Height: 7 mm. Compatibility: PC&Notebook