Gasket StructureTOP 4-layer sound deadening structure KnobsMulti-function Rotary Knob FEATURESRocker design + double layer magnetic stand Positioning platePP slotted Po Sandwich Cotton + Po Shaft Lower Pads PCBA 1.2 mm slotted PCBA upper light position Battery4000mAh Main LightRGB-Upper Light Position SystemWindows/Mac OS, Linux (driver not supported) DriverLEOBOG One WeightApprox. 1232g (without cable)