Rossmont Waver Wireless 2 Channel Controller (Master) The Rossmont Waver Wireless 2 Channel Controller (Master) is the first controller for AC synchronous aquarium pumps powered at mains voltage. Only compatible with Rossmont Mover pumps. You can adjust the speed and subsequent flow of all Rossmont Mover Pumps M900 through the MX4100 by simply plugging into the Rossmont Waver The Rossmont Waver has two separate independent channels to control up to two pumps and it powers them without the need of any adaptor or particular plug This wavemaker actually ramps up and ramps down the pump like DC controllers The technology is also completely backwards compatible. Every Rossmont Mover pump ever manufactured will work with the Waver.