Input power is universal AC:
100-240 Volts AC; 50, 60 Hz
ROV power from the control panel to the ROV via the tether is as follows:
48 Volts DC Scout, Explorer, Pro (series except Pro 4), Deep Blue
74 Volts DC Pro 4
For more information, see the FAQ, "What is the pin-out for the 8 pin term block whip on the ROV?"
Power available via the accessory port for Pro series can be found in the FAQ, "What is the pin-out for the 9 pin ROV accessory connector?"