Mtroniks Viper Marine 15 ESCThe Viper Marine15 is a brushed speed control designed specifically for use in RC model boats. It has a 15Amp motor limit, what this means is that you can use any, DC brushed motor, as long as the current drawn by that motor does not exceed 15Amps under load (with the prop connected, under water). The Marine15 is the perfect speed controller for anybody wanting to either upgrade their old speed controller for a no nonsense 15Amp limit reversible