Features: 1.22-key Wireless Numerical Keyboard - Helps you input numbers more conveniently and more directly. 2.1200DPI Optical Mouse - High sensitivity up to 1200DPI enables the optical mouse to work more flexibly with no delay. 3.2.4GHz Nano Receiver - This wireless numeric keyboard mouse set connect both keyboard and mouse to a computer through plugging the 2.4GHz nano receiver to the USB port to achieve stable and smooth number input and mouse operation. 4.Plug and Play - After plugging the receiver to a computer USB port, the wireless numeric keyboard and optical mouse will work normally with no software or driver required. 5.Portable - Wireless design and mini size, light weight allow you to carry it to everywhere you want. specification:Description: This wireless numeric keyboard mouse set help you control your computer easily through an optical mouse and input number conveniently with a 22-key numerical keypad. 2.4GHz nano receiver makes connection between computer and keypad, mouse very stable and smooth. And 1200DPI enables the mouse to work more flexibly and smoothly with no delay. 22-key Wireless Numerical Keyboard - Helps you input numbers more conveniently and more directly. 1200DPI Optical Mouse - High sensitivity up to 1200DPI enables the optical mouse to work more flexibly with no delay. 2.4GHz Nano Receiver - This wireless numeric keyboard mouse set connect both keyboard and mouse to a computer through plugging the 2.4GHz nano receiver to the USB port to achieve stable and smooth number input and mouse operation. Plug and Play - After plugging the receiver to a computer USB port, the wireless numeric keyboard and optical mouse will work normally with no software or driver required. Portable - Wireless design and mini size, light weight allow you to carry it to everywhere you want. s: Product type: Wireless Numeric Keyboard Mouse Set Connection: 2.4GHz nano receiver, wireless connection Optical resolution: 1200DPI Plug and play: Support Keyboard keys number: 22 keys Power supply: Keyboard: 1 * AAA battery; Mouse: 1 * AA battery( not included) Package size: approx. 21 * 10 * 5 cm/ 8.27 * 3.94 * 1.97 in Package weight: 201g Package List: 1 * Wireless Numerical Keyboard 1 * Optical Mouse 1 * User Manual