Use range:The silent 370 water pump is suitable for installation on a remotely controlled boat that requires water cooling for the water-cooled motor and does not have a suction rudder. The pumping voltage of the 370 motor is 3-6V, which can be directly plugged into the receiver for power. 6S (7-28V) battery 5V feed pump. Suitable for remotely controlled aircraft carriers, warships, battleships and other trains that require water cooling for electric motors and ESCs. Connector description:JR plug: also known as plug, this connector is suitable for direct plug-in receiver use;Step-down module: Since the voltage used by the pump is 3-6V, if your power is not taken from the receiver, and the battery used is 2S, that is, 2S, 3S, 4S, 5S, 6S batteries, the voltage is Between 7-28V, you need to use this step-down module to reduce -down voltage to a 5V water supply pump. Switch: Add a switch between the pump and the power supply. When the pump needs to work, turn on the switch. When you need to turn off the pump, turn off the switch. Water pump working test:After actual testing, the water pump works continuously for 15 hours under the condition of 5V voltage, and the pump work normally. The temperature be hot, but it is in the normal range and not affect the use. other instructions:Pump head outlet diameter: 3.95mm, center hole is water outlet out, eccentric hole is water inlet in. Use voltage: rated 6V, use 3-6V Voltage: 3 V Pumping flow: 1.1L / one minute Pumping flow: 300ml / one minute Voltage: 6 V Pumping flow: 1.8L / one minute Pumping flow: 600ml / one minute Pump size specifications: Pump size: including pump head outlet length 72mm, motor outer diameter 24.4mm, pump head outer diameter 28mm Pump length: 73mm (including 7.8mm inlet and outlet lengths) Outer diameter of water inlet and outlet: 3.95mm, waterproof version of the pump: you can directly throw the pump into the water to work. Colour:White Material:metal Size:72*28*28mm Package Contents: 1 * Water pump Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.