Bekhic USB Bluetooth 4.0 Adapter Dongle Receiver Connect your Computer/Laptop with Bluetooth Enabled Devices such as Mobile Phones, Printers, Headsets etc. Latest Bluetooth specification v4.0 Class 2 with low energy technology; Fully compatible with older Bluetooth equipment Compatible with 32 bit and 64 bit Windows 8.1/ Windows 8 / Windows 7 / Vista / XP Wireless range of up to 10m-50m in free space. Data Rates: Up to 3Mbps Frequency Band: 2.4 ~ 2.4835GHz unlicensed ISM band