This is HiModel new waterproofing brushless motor speed controller for boats. Featurers with '*' are only available for configuring via program box/card. Waterproofing, speciall designed for boats application. Can connect to programming box (with LCD display), easy to set up various parameters. (programming box not included) Cell number selectable via program box from 2-5 cells for lipo, the cut-off voltage of each cell can be set between 2.0-3.2V at 0.1V step. The cut-off voltage for Ni-Mh/Cd battery is selectable from 0.4-1.0V per cell at 0.1V step. * Timing mode: 0-30° selectable at 1°step. * 3 PWM mode selectable for work with different motors, 8Khz/16Khz/32khz. 3 throttle curve modes: logarithmic, linear and exponential. * 3 accelerating modes: slow/medium/fast, together with the throttle curve function will give you the idea throttle curve setting. * Safely power on: it will not immediately start the motor regardless the position of throttle when power on the ESC, avoid damageing to people. With reverse function, the reverse delay is adjustable. * With forward/backward output limit function. * Throttle range auto detect and also manually set to a fixed position. * Over heat protection. 110℃. Signal lost portection: it will shut off 3 seconds later since signal lost. Specifications: Weight: 45 g Size: 52 x25 x12mm Constant Current:70A Max Current: 90A (for ten seconds) FET: 48 BEC:NO PWM: 8 KHz Input: 2 to 5 Li-Po, or 6 to16 Ni-MH/Ni-Cd