Robust and trustworthy. Cofrecillo in frivolou and compact aluminium. Ventilation forced by ventilator. It allows recharges her with a set of batteries up to 300Ah. I change frequency and voltage for internal strap. 2 curves of load: all kinds of batteries, or batteries without maintenance type Delphi. Dimensions: 210x135x85 mm. I weigh 2 kg.