Jebao MOW Wavemaker pumps are super small and almost silent. The DC powered pumps can be plugged directly into any wall outlet for plug and play operation, but can also be controlled through Wi-Fi, all you need is a smartphone and the Jebao App.Mode function introduction: W1: Classic Wave Mode remote the up/down button to adjust the wave patterns among one or more pumps at the same time. W2: Sine Wave Mode: one or more pumps can operate at the same time in this mode the flow rate changing between 30-100% and flow regulation looks like s sine curve. Else: Random Wave Mode: one or more pumps can operate at the same time, it is a random mode of the pump power change in a random date all the time without regulation. H: Constant Wave Mode; One or more pumps can operate at the same time. C: Shift to flow mode: Two pumps are needed to be operated at the same time Then they shift from wave to flow alternately P1 work, P2 stop, P2 work, P1 stop alternately. Feed Mode: short press the stop button, the pump stops working for 10 minutes for the fish eating. 100V 60Hz US plug, 500L(132gal) to 5000L (1320gal), Recommend for 30-50 gallonsInput: DC 24V 12-watt; Dimension: 2" Dia x 3"L