Fangrui Product Details 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. Conversion Efficiency:synchronization Rectification Technology-multiple Intelligent Protection Function With High Conversion Efficiency And Stability. Colour: Silver Material: Metal Size: 7.4x7.4x3cm Package Contents: 1 * Dc 48-12v 20a Voltage Converter Only The Above Package Content, Other Products Are Not Included. Note: Light Shooting 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.