ITEM NAME:3-6V 370 Water Cooling Water Pump JR Connector for RC Electric Boat Accs Description: RC Electric Ship Boat Waterproof Water Cooling Pump 370 JR Connector Brand new and High Quality Suitable for aircraft/warship/battleship whose motor or ESC needs water cooling The pumping voltage is 3-6V and can be connected to receiver directly It has a step-down module, the voltage changes to 5V automatically when the battery you use is more than 2S battery(2S, 3S, 4S, 5S, 6S) & voltage is between 7-28V Size Chart: Pump LxD: 72x28mm / 2.83x1.1inch Water Outlet Diameter: 3.95mm / 0.16inch Package Includes: 1 Piece Water Cooling 370 Water Pump Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item Due to manual measurement, there may be 1-2mm error in size SKU: DMO0004039076004737.1 Piece Water Cooling 370 Water Pump. Due to the difference between different monitors, the picture may not reflect the actual color of the item.