Check the listing for details. Bluetooth 4.0 USB 2.0 CSR 4.0 Dongle Adapter for PC LAPTOP WIN XP VISTA 7 8 10. Color: Black, Condition: New. Listed at 2.46 USD. New Mini USB Bluetooth Adapter CSR Dual Mode Receiver for Windows 10/8/7/XP V4.0 technical specifications of 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 (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 Extra Information: Bring back the original brand new look!This is a NEW part.This item is BRAND NEW! Save MONEY and your device by using the best replacement part available.This Assembly ships with a protective foam wrap, along with a protective plastic to prevent any scratches.This item is very carefully packaged Payment Information:We Accept PayPal