Cougar 250M MOC250B Black 6 Buttons 1 x Wheel USB Wired Ambidextrous Optical 4000 dpi Gaming Mouse This unit is Grade B refurbished by an authorized distributor. Unit may come with some slight cosmetic defects (scratches, scuff marks, dents, bumps, discoloration), but will include all required accessories and will be in 100% working condition. Included with a 30-day return warranty.