The Silence electronic is a safety low voltage, speed-controlled recirculation pump. It can be used in any aquarium and features a new microprocessor-controlled motor, which makes it an “intelligent pump": The electronic motor speed is adjusted to the pump load automatically, always searching for the optimum output/energy consumption ratio. Energy consumption is approx. 50% lower than of conventional pump motors. If the pump is blocked, it will be turned off immediately. Once the blockage has been removed, the pump will restart automatically after a delay of 20 seconds. It features a Fish Care function, which will cause a propeller rotation every 20 seconds if the pump is stopped. It can be controlled by Multicontroller 7095, 7096 as well as Wave controller 7092. Flow rate at 18 V: 240 to 580 US gal./hr. Flow rate at 24 V: 290 to 790 US gal./h. Hmax. at 18 V: 98.4 in. Hmax. at 24 V:153.5 in.¾" NPT hose barbs Energy consumption at 18 V: max. 26 Energy consumption at 24 V: max. 43 Voltage / frequency: 100 – 240 V / 50 – 60 Hz Cable length: 196.8 in..