300A 14S Waterproof Motor Speed Controller with Water Cooling System Designed for Water Sports Surfboard RC Boats In the last years, XC technology has released 6 electronic speed controllers (ESC, motor controller) for RC cars and RC trucks and earned a place in this field. This year, we release a new product-motor controller for water sports, such as surfboard, thruster or sea scooter and RC boats, letting you enjoy the fun of surfing even in calm lakes. 1. Current: Continuous current 300A 2. Output: 6-14s Li-Po 3. Motor: BLDC Sensored or sensorless brushless motor 4. Speed: