Description: Brushless Water Cooling Electric Speed Controller ESC replacement parts. Single LIPO protection voltage 3.0V Voltage range 4.8V-29.75V, brushless sensorless motors for the vast majority of models with 14-pole motor speeds up to 30,000 RPM. Waterproof design,high performance. Perfect speed controller for rc boat Specification: Voltage range 4.8V-29.75V PWM frequency:8K / 16K / 32K 50A support 4S battery with 3A UBEC output with water-cooled one-way without back 70A support 6S battery with 5A UBEC output with water cooled one-way without back 125A support 6S battery with 5A UBEC output with water-cooled one-way without back 200A support 6S battery with 5A UBEC output with water cooled one-way without back Size Chart: 60A Size:Approx.73x38x15mm/2.87x1.50x0.59inch 80A Size:Approx.95x38x17mm/3.74x1.50x0.67inch 100A Size:Approx.95x40x15mm/3.74x1.57x0.59inch 125A Size:Approx.98x40x15mm/3.86x1.57x0.59inch 200A Size:Approx.95x40x25mm/3.74x1.57x0.98inch Package Includes: 1 Piece Brushless ESC. Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.