The Targus Wireless Numeric Keypad allows users to type numbers into spreadsheets and other applications quickly and easily. The integrated ergonomic tilt provides added comfort which helps reduce wrist and finger strain. Key Features: Mfr. Part #: AKP11US Wireless Numeric Keypad 2008-2009 Full-size 19mm keys USB wireless receiver included Battery life indicator Battery: AAA On Off switch Keypad Wireless Operating Distance: 33 ft Dimensions (WxDxH): 5 in x 3.5 in x 1 in Compatibility: PCs and Macs Software Compatibility: Windows® 7, Vista/XP/2000, Mac OS X 10.4 and later Ships priority USPS.