Hobbywing "SeaKing" series ESC is specially designed for boat, so it has the water-cooling system and the whole ESC is waterproof.

1 Specification
1.1 Output: Continuous current 90A, burst current 180A.
1.2 Input: 6-18 cells NiMH/NiCd or 2-6 cells LiPo.
1.3 BEC Output: 6V@3A Switching mode built-in BEC.
1.4 Suitable Motor: Sensorless Brushless Motor
1.5 External diameter of the water cooling pipe: 5.0mm
1.6 Size: 94mm(L) * 33mm(W) * 18mm(H).
1.7 Weight: 81g

2 Features
2.1 Use top quality electronic components to enhance the current endurance ability of the ESC.
2.2 Special designed for RC boat, with excellent start-up, acceleration and linearity features.
2.3 With water cooling system and the whole ESC is waterproof to get a longer life.
2.4 With 2 running modes ("Forward" mode and "Forward/Backward" mode).
2.5 Multiple protection features: Low voltage cut-off protection for lithium or nickel battery / Over-heat protection / Throttle signal loss protection.
2.6 With 8 steps of timing adjustment, compatible with all kinds of sensorless brushless motors.
2.7 Swtching mode built-in BEC has a very powerful output even working with 6 cells lipo battery.
2.8 User programmable and compatible with the pocket-sized Digital LED Program Card (Optional equipment) to set the ESC easily.