Stylish Ultra-Slim design Keyboard & Mouse, Sealed membrane for overall protection, Brush metal finish, Advanced controls 2.4G wireless technology with 10m working range and nano-receiver, Energy saving design standby function Multimedia Keyboard 104 keys + 8 hot keys, High-Quality soft and silent keys, Easy cleaning flat-square design keys, Ultra-durable UV-ink printed keys Professional Optical sensor with direct DPI switch 800/1200/1600 dpi, High quality switches for over 2 million clicks supported Smooth responsive cursor control with easy scrolling, Designed for professional or gaming use