Feature:1. Soft Press Touch: Numeric keypad provides you with the most comfortable tilt angle to help reduce pressure on your wrist2. 18 Keys: 18 key USB numeric keypad with low noise design for working with spreadsheets, accounting documents or financial applications3. Plug and Play: Number keypad requires only a battery and a USB port, providing you with the most stable USB connection4. Scope 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 systems5. Small and Compact: The small and compact body does not take up too much use space, which is convenient for storage and useSpecification:Item Type: Numeric KeypadMaterial: ABSModel: SK 51AG Interface: USBConnection: 2.4G WirelessEffective Distance: 10meters/10.9ydNumber of Keys: 18 keysBattery Type: 1 x AAA Alkaline Battery (not included).Package List:1 x Numeric Keypad 1 x Receiver1 x User ManualNote:Shipped without battery