Feature: 1. Comfortable: Portable silent number pad is soft to the touch and provides the most comfortable tilt angle to help reduce stress on your wrist. 2. 19 Keys: Portable number pad is 19 keys with minimal noise, perfect for working with spreadsheets, accounting documents or finances. 3. Plug And Play: USB numeric keypad uses with 1 x AAA battery installed (not included), no driver required, just a usb port, plug and play. 4. Application: Wireless numeric keypad is suitable for notebook and desktop computers with for Windows98/95/NT/ME/2000/XP/Vista/7.0/8.0 and above operating systems. 5. Durable: One hand numeric keypad is made of premium ABS material, which is durable. Compact size and easy to carry. Bring security to your computing. Specification: Item Type: Wireless Numeric Keypad Material: ABS Color: Black Connection Mode: 2.4G Wireless Battery Type: Requires 1 x AAA Battery (Not Included) Number Of Keys: 19 Keys. Package List: 1 x Keyboard1 x Connector1 x Instruction Manual