- 24 relegendable keys - Suitable for handheld, desktop, or mounted use - Addressable blue and red backlighting for each key - USB connection (other options available) Our most popular X-keys. The XK-24 offers twenty-four programmable keys to trigger macros, shortcuts, and applications, select tools or open files or directories. With a co-injected case equally suitable for handheld or desktop applications, the XK-24 provides a versatile control box for any computer driven application. Use key blockers and tall or wide keycaps to instantly customize the XK-24 for your specific requirements. Detachable feet give the XK-24 a slight angle to make the key legends easier to read. Repositioning keys and feet allow the XK-24 to assume a "landscape" orientation with four rows and six columns.