Description Advanced 2.4 GHz wireless connection delivers the reliability and speed of a corded connection with wireless convenience and freedom up to 33 ft away,so you can forget about drop-outs and delays and you can take wireless keyboard and mouse wherever you use your computer(USB receiver is in mouse’s battery compartment) The optical wireless mouse have the 800/1200/1600 DPI allows you to track it more smoothly on a variety of surfaces.Usually 800/1200 DPI for office, DPI 1600 for entertainment like gaming at home The design of this keyboard and mouse wireless creates a comfortable typing experience thanks to the low-profile, quiet keys and standard layout with full-size F-keys, number pad, and arrow keys.The ergonomic tilt angle offers a better typing position to reduce the pressure on your wrist and increase comfort Wireless keyboard mouse combo can work with your PC, Desktop, Laptop or Notebook. Compatible with Windows XP / Vista / 7 / 8 /10 operating systems; simply plug in to your laptop or desktop computer and begin using COLIKES wireless mouse and keyboard has the function of automatically entering the power-saving state，plus ON/OFF switch to help conserve battery use, you can go for months without the hassle of changing the batteries.The keyboard requires one AAA battery, and the mouse requires two