Ergonomic Design, Plug and Play, Intelligent Dormancy, Drop Key Cap, HD Laser Engraving Fonts, Comfortable Experience, 2.4 GHz Wireless Connection Unique Hand Feel Fashionable incredibly thin keyboard and mouse design, Advanced controls, brush metal finish, and a sealed membrane for general protection. Type of Battery: AAA Professional 800/1200/1600 dpi optical sensor with direct DPI switch, superior switches that support more than 2 million clicks Scrolling is simple and the cursor control is responsive. Made for gaming or professional use