Voltage: 4.5~12V, flow: 200~450L/H. Continuous working life (24 hours non-stop work) more than 20000 hours, about 10 hours per day, water pump life for 8 years. The inlet and outlet diameter is 12.25mm, support inside diameter 8-10mm water-cooled silicon rubber hose use. Bottom of pump with 4 soft sucker, can be arbitrarily fixed. Super mute, noise figure is 30dB.