Mtroniks Viper Marine 40 Speed Controller Forwards & Reverse Marine ESC NEW built in failsafe to protect against complete loss of signal or when out of range (compatible with all manufacturers receivers)**INDUSTRY FIRST** ABSOLUTE short circuit and motor overload protection 40A current limit Dual core microprocessor 6-12Volts input voltage Adjustable features include programmable punch on the forwards only range and programmable reverse (including disable) & programmable brakes on the reversible range 4 Layer super power circuit board Thermal integrated protection system Digital one touchset up Legendary 100% waterproof design Dimensions : L39.0mm x W34.0mm x H13.0mm Weight : 55g All Mtroniks VIPER ESCs are capable of running the highest capacity cells available & the latest high spec motors. Each VIPER ESC incorporates a 1.2A BEC and the latest state of the art technology and GEN-Xi power FETs!