FVT BOAT040 40A Brushless BOAT ESC Speed Controller 5V\/3A RC Boat PartSpecification Output: Continuous current 40A、 burst current 80A.Input: 5-18 cells NiMH\/NiCd or 2-6 cells LiPo. BEC Output: 6V\/ 3A linear mode BEC.Suitable Motor: Sensorless Brushless Motor.Water Cooling Pipe: 4.5mm (external  diameter)Size: 84mm(L) x 29mm(W) x 22mm(H).Weight: 84gFeatures 1. Use top quality electronic components to enhance the current endurance ability of the ESC. 2. Special designed for RC boat、 with excellent start-up、 acceleration and linearity features.3. With water cooling heat-sink、 the ESC is splash-proof (Note: Not 100% water-proof)、 running modes !#!amp!*!quot;Forward\/Backward!#!amp!*!quot; 4. Multiple protection features: Low voltage cutoff protection to prolong the battery life \/ Over-heat protection 5. With 5 steps of timing adjustment、 compatible with most of sensorless brushless motors.6. User programmable.7. Multiple program methods supported: Transmitter stick、 LED Program Card. Very easy to program the ESC at home or at the racing field.Package Included1 x ESC