Kafuty CSR4.0 Mini USB Bluetooth4.0 Adapter, Wiress Dongle Receiver, with 3Mbps Transmission Rate, for Windows Mouse Keyboard Headset.

【CSR4.0 and interface】using CSR8510 chip, in line with Bluetooth 4.0 technical specifications and dual-mode transmission. The USB2.0 interface is more versatile. 【For CSR original drive management software】For CSR Harmony, the drive management software is easy to use, powerful, and supports various application extensions (for Microsoft OFFICE software). 【Features】ultra-low latency speed connection, intelligent sleep wake-up energy saving, 24-bit CRC check to resist interference, adaptive frequency hopping to reduce crosstalk. 【Transmission】20m transmission distance, when the signal is strong, the transmission distance is longer (no obstacle). 3Mbps transmission rate, a more stable transmission rate, providing high-speed file and audio data transmission. 【Portable】lightweight, super mini and portable. It is fully backward compatible with Bluetooth 2.0, Bluetooth 2.1, and Bluetooth 3.0 specifications.