World's best esc for r/c boat. Waterproof, high efficiency water cooling system, just name a few. Bottomline: 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 box 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 specs: model / sku seaking-180a-v3/ 30302181011 cont. /peak current 180a/1080a boat applicable boat length < 130cm input / 2-6s lipo bec type / bec output switch mode /6v/5a external programming port available water cooling pipe (inside / outside): ?3. 0 / 5. 4mm input wire red-10awg-200mm*1 black-10awg-200mm*1 output wire black-10awg-150mm*3 size / weight 72x48x36. 6mm (include the water cooling pipe) 207g (hw30302400)