Waterproof and performs exceptionally well in water. Features a JR connector for easy plug-and-play connection to your receiver. Operates continuously for 15 hours when powered by a 5V voltage, ensuring uninterrupted water pumping. While the pump may get warm during normal operation, this is within the normal temperature range and does not affect its performance. Designed for RC boats, this 370 motor water pump operates on 3-6V and can be directly connected to the receiver for power. Utilize a step-down module to connect a 2-6S (7-28V) battery for a 5V water pump. Item Type: RC Boat Water Pump Material: Metal Color: As Shown Total Length: Approx. 73mm/2.9in Motor Length: Approx. 24.4mm/1.0in Pump Head Diameter: Approx. 28mm/1.1in Water Outlet Length: Approx. 7.8mm/0.3in Water Outlet Diameter: Approx. 4.3mm/0.2in Weight: Approx. 66.0g/2.3oz Waterproof Pump: Can be submerged directly in water to operate. JR Connector: Suitable for direct plug-in use. Actual testing confirms continuous operation for 15 hours at 5V without interruption. Normal operating temperatures may be warm but are within acceptable limits. Operating Voltage: Rated 6V, usable range 3-6V. At 3V: Pump water flow rate is 1.1L/min, pump water flow rate is 300ml/min. At 6V: Pump water flow rate is 1.8L/min, pump water flow rate is 600ml/min. Application: Quiet 370 water pump, ideal for RC boats requiring water-cooled engines and without a water-absorbing steering gear. The 370 motor pump operates on 3-6V and can be powered directly from the receiver. With a step-down module, it can be connected to a 2-6S (7-28V) battery to step down to a 5V pump. Perfect for remote control aircraft carriers, warships, battleships, and other RC vessels that require water-cooled engines and ESCs.