1) APPLICATION: Only fits for Wit-Motion Bluetooth 2.0 sensor, including BWT901CL, BWT61CL, BWT901, BWT61 (2) DESIGNED FOR CONVENIENCE: Based on HID Tech, CH340 driver design, plug and play (3) SUPERIOR COMPATIBILITY: Compatible with all Windows system (4) STRONG DESIGN: anti-dust, cap-design, small in size, easy to carry, 10 meters Bluetooth connection (5) WHAT YOU GET: 1 x WitMotion USB-HID Bluetooth adapter +1 x Instructions card