USB 2.4Ghz RF Wireless Multimedia Tiny Keyboard This keyboard is a 78 key + 20 Multi-Media enhanced layout 2.4 GHz. RF Wireless keyboard with a built-in high precision 1000 DPI trackball. Its portable and tiny design can be used for travel, school, or any other working environment. It is especially suitable for HTPC. with htpckeyboardusbwireless