- BEC: Switch mode, 6V/5A output          - Input: 6-18S Ni-Mh/2-6S Lipo     - Water cool mouth: Diameter 5.4mm     - Dimension: 68.5*39.4*32mm     - Suit for length <110cm boats          Product Description:          The waterproof design (Rates as IP 67) allows this Seaking-180A-V3 ESC to work in water without any extra precautions, so the speed controller is applicable for all the RC boats with the length less than 130cm (51.18"). Besides this ESC adopted the Copper Bar Heat Conduction technology(Patented) and water cooling system, which can easily dissipate the heat produced in operation under high load. Furthermore, the special algorithm, designed for RC boats, make the acceleration punchier and the sailing more stable. With all those mentioned features and some more protections can definitely escort your boat all the time.          Features:          Burst current - 1080A.     Waterproof.     Come with built-in water cooling system.     Programmable.     Easy to setup                Additional Information:          Motor Type     Brushless     Forward Current (A)     180     Forward Burst Current (A)     1080     Reverse Current (A)     Input Voltage (v)     7.4     Max. Input Voltage (v)     22.2     BEC     6V/5A (Switch Mode)     Programmable     Yes     Fan Heatsink     No     Water Cooling     Yes     Dimension (mm)     72 x 48 x 36.6     Net Weight (kg)     0.207     Cross Weight (kg)     0.29