USB 2.0 Mini Bluetooth 4.0 CSR4.0 Adapter Dongle

Bluetooth 4.0 
Backwards compatible with Bluetooth 2.0 / 2.1 / 3.0 version
Dual-mode transmission
Long transmission distance: Up to 20m - 50m transmission distance (if no blocking), strong signal
Stable transmission rate: 3 Mbps transfer rate, providing high-speed file, audio data transmission
CSR-driven management software: CSR Harmony-driven management software easy to use and powerful, supporting multiple application extension
Ultra-low latency link speed, intelligent wake-up energy-saving, 24-bit CRC checksum against of interference, adaptive frequency hopping to reduce cross talk

Compatible with Windows 10 8 / Windows 7/ Vista/ XP / Mac OS