CX146B Product Description: This kit includes a PC remote controller and a retractable USB receiver. This kit includes a PC remote controller and a retractable USB receiver. This kit is ideal for PC/Laptop.   Key Features: Wireless remote control. Make listening to the music， watching movie and browsing the Web more convenient. Comes with a retractable USB receiver. Supported Operating System: Windows 2000， Windows XP， Windows MCE and Windows VISTA. Ideal for PC/Laptop.   Details: PC remote controller and a retractable USB receiver