Hand rest keyboard for Philips C284 wired keyboard and mouse set for notebook, desktop, business, and office computers Simple wired USB connections that plug and play For quick scrolling, press the mouse scroll wheel release key. Use the scroll wheel release button to navigate through lengthy documents or web pages quickly. To scroll quickly, click once; to lock the scroll into a more controlled speed, click again. Categories: Keyboard & Mouse, Accessories & Supplies Tag: KEYBOARD