Built-in protection against short-circuits, reverse polarity, overheating and overloading. Analogue dial offers quick and easy monitoring. Suitable for lead-acid battery types. 1 year guarantee. Strong metal casing. 6 or 12 volt. Suitable for petrol engines up to 4000cc and diesel engines up to 3000cc. Suitable for 12V batteries and batteries with a capacity of 120Ah. Charge time up to 20 hours. Short circuit protection.