Cherry MX keyswitches, rated at 50 million operations | 24 fully programmable keys with relegendable keycaps | Included with 3 double keys, 3 extra single keys, and a keycap puller and a 6' RS232 DB9 cable with Type A plug | 2-level programmable, equivalent to 48 keys, LED Indicator Light (top right) | Supports USB MultiMedia keys * Supports F1 through F24 | External Power Supply, Low power consumption | Optional protective latex covers available | 1-year factory warranty