This is a Hobbywing SeaKing V3 130-Amp HV Waterproof Brushless ESC.Features: Excellent waterproof design (rates as IP 67) allows this ESC to work in water without any extra precautions High quality components have very strong over-current withstanding capabilities Patented Copper Heat Conduction technology and high-efficiency water cooling system can easily dissipate the heat produced in operation under high load The special firmware designed for RC boats can make the acceleration punchier and the sailing more stable The external Programming Port can connect to the LED Program card for easily setting the parameters of the ESC Multiple protections like low-voltage cutoff protection, thermal protection and throttle signal loss protection, make the ESC more reliable The anti-spark circuit attached on the input wires eliminates the eletrospark created when connecting the ESC to battery Dual water-cooling tubes make the heat distribution on the heat-sink more proportional Water Cooling Pipe Specs:Boat Applicable: Boat length < 150cmContinuous Current: 130APeak Current: 720AInput: 5-12S LipoInput Wire: Red-10AWG-150mm*1; Black-10AWG-150mm*1Output Wire: Blue-12AWG-100mm*3BEC Type: Without BECExternal Program Port: AvailableDimensions: 88X58X23mm (Including the Water Cooling Pipe)Weight: 182g