Intelligently switch among multiple devices The combo intelligently connects to the working device. They pair multiple devices, and switch among them with ease. They simplify complicated cross-platform use and meet multi-tasking requirements. Switch between Bluetooth 3.0, 4.0 and 2.4G The smart switch between Bluetooth 3.0, 4.0 and 2.4 GHz ensures stable wireless transmission. You can still use the combo regardless of USB port shortage or the loss of receiver. 1300 DPI tracking engine Enjoy accurate and smooth cursor control with the 1300 DPI invisible tracking engine. 4.9 mm ultra-slim design with aluminum alloy base The ultra-slim body is made of anodized aluminum and is only 4.9 mm thin. The scissor-key technology ensures perfect and accurate keystrokes. Chiclet keys and scissor key structure for comfortable and accurate typing Chiclet keys, square with rounded corners, make every keystroke smooth and correct.