... ,for both hands 4,OEM & ODM Targus Kaleidoscope Mini Retractable Optical USB Notebook Mouse **Brand NEW**Compatible With: Windows 2000, Me ... RF carrier: 2402-2480MHzRF operation channel: 16, auto frequency hoppingUSB: USB 2.0Operation systems: Windows 2000, Me, XP, Vista, Win ... must contain all original packaging materials. Targus Kaleidoscope Mini Retractable Optical USB Notebook Mouse **Brand NEW**