Features 1Soft Press Touch: Numeric keypad provides you with the most comfortable tilt angle to help reduce pressure on your wrist 218 Keys: 18 key USB numeric keypad with low noise design for working with spreadsheets, accounting documents or financial applications 3Plug and Play: Number keypad requires only a battery and a USB port, providing you with the most stable USB connection 4Scope of Application: USB wireless number keypad is suitable for various laptops and desktop computers with for Win 2000, for OS X, for XP, for Vista or for Win 7 and above operating systems 5Small and Compact: The small and compact body does not take up too much use space, which is convenient for storage and use Specification Item Type: Numeric Keypad Material: ABS Model: SK 51AG Interface: USB Connection: 2.4G Wireless Effective Distance: 10meters/10.9yd Number of Keys: 18 keys Battery Type: 1 x AAA Alkaline Battery (not included) Package List 1 x Numeric Keypad 1 x Receiver 1 x User Manual Note Shipped without battery