The Quick Fire Rapid Si by CoolerMaster is a TenKeyLess keyboard with 87 keys, which uses CHERRY MX Blue, Brown, Red switches. The Quick Fire Rapid Si keyboard uses a Removable Micro-USB 2.0 connection, with a 1.8m Braided with Right-Angle Bend cable. It is supported by No software. And has White backlighting with 5 brightness levels, 5 lighting modes effects. It weighs in at 980 g, and is 359 x 138 x 39 mm [LxWxH].