The Janus Transmission hi-hat is made by Mapex. It is a double pedal and hi-hat stand in one. It has only two pedals, the slave pedal controlling both the slave beater and hi-hat depending on where the pedal is set to. The system works by moving the slave footboard. There are two foot guards on either side of the pedal. If you slide the pedal to the left, the hi-hat can be controlled, when slid to the right, the beater is controlled. This can be changed mid-song.