This 82-key keyboard with built-in touchpad and HUB port for easy operation, which allows you to transfer data more quickly and more convenient. Plus, with the durable and strong button on the touchpad, it allows you to operate your computer when there's no mouse. Moreover, it supports any desktop and laptop computers and other devices. Specification: Type: Wired USB Touchpad Keyboard Model: MC-818 Interface: USB Connection method: Wired Number of keys: 82 Cable length: Approx.1.5m / 1.6yd Size: Approx. 31 * 11.5 * 2cm / 12.2 * 4.5 * 0.8in Weight: Approx. 365.2g Package list: 1 * Keyboard Note: Please allow slight error due to manual measurement. Thanks for your kind understanding.