1、Two in One: The combination of wireless numeric keyboard and mouse only needs one USB port, plug and play, which is more convenient. (The wireless receiver is on the back of the mouse) 2、Comfortable: The 22‑key numeric keyboard designed with an inclined angle gives you a comfortable experience and effectively improves efficiency. 3、Portable: Convenient and quick design, quiet and comfortable, perfectly matching your work. 4、Strong Compatibility: Universal for desktop and laptop computers. (This notebook computer's numeric keyboard may not be fully compatible for OS system, the function keys may not work, and the numeric part works normally) 5、Using High Grade ABS Material: Smooth operation, perfect touch, flexible and durable. Item Type: Numeric Keyboard Mouse Set Material: ABS Model: MC-61CB Colour: Black Connection: Wireless 2.4g Wireless Distance: Approx.10m / 10.9yd Number of Keys: Keyboard 22 Keys, Mouse 3 Keys Battery Type: Keyboard 1 x AAA (Battery Not Included), Mouse 1 x AA (Battery Not Included) Applicable Equipment: Desktop and Laptop Computers (The Laptop Numeric Keyboard May Not Be Fully Compatible for OS System, the Function Keys May Not Work, but the Digital Part Works Normally) 1 x Keyboard(Battery Not Included) 1 x Mouse(Battery Not Included) 1 x Receiver 1 x User Manual