Reliable Plug and PlayAdvanced 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 mouses battery compartment) 3 DPI Levels for Gaming and WorkThe 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 Comfortable & Smooth TypingThe 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 Wide CompatibilityWireless keyboard mouse combo can work with your PC, De