Waterproof Function: Water cooling pump is in waterproof design, and it can works well even in water,at the same time, it has a long service life. Long Work Time: The JR plug is suitable for insertion into the receiver. At 5V, the pump will still operate normally after 15 hours of operation without interruption. Great Performance: It's hot but it's in the normal range, which has no impact on future operation Low Noise: The low noise design gives you the perfect game playing experience. 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 step down 5V feed pump. Suitable for remotely controlled aircraft carriers, warships, battleships and other trains that require water cooling for electric motors and ESCs.<br><br>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 will work normally. The temperature will be hot, but it is in the normal range and will 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: including pump head outlet length 72mm, motor outer diameter 24.4mm, pump head outer diameter 28mm Pump length: 7m (including