The Turbelle Nanostream 6040 electronic WIDE FLOW is Tunze`s smallest speed-controlled circulation pump with an extra-low 12V safety voltage. It also features a Fish Care Function that triggers a revolution of the propeller every 20 seconds when the pump is in standstill. For aquariums from 20 to 500 liters (5.3 to 132 USgal.) Circulation performance: Approx. 53 to 1190 USgal./h (200 to 4500l/h) Power consumption: 1.5 13W Power supply unit: 100V / 50-60Hz Cable length: 3m (118 in.) Dimensions without flow deflector: 65mm (2.56 in.) x 65mm (2.56 in.) x 65mm (2.56 in.) Outlet: 40mm (1.57 in.) Silence Magnet Holder up to a glass thickness of 15mm (1/2″).