Waterproof Level upgrade:IP68,moisture-proof & anti-shock protection.More safer:built in smart chip, full protection against over/under voltage input, over-current, overload, overhead, over-temperature and short circuit.Better Heat Dissipation:Upgraded fin type heat sink with a thick aluminum plate inside fixture to help to dissipate heat more efficiently.long life.Sturdy and Safe materials:die-cast aluminum shell and high quality design.96% conversion efficiency:Synchronization rectification technology-multiple intelligent protection function with high conversion efficiency and stability.Colour: silverMaterial: metalSize: 7.4x7.4x3cmPackage Contents:4 * DC 48-12V 20A Voltage ConverterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.