Aluminum shell and high quality , maximum transfer efficiency of 96%. Built-in full protection against over/under voltage input, over-current, overload, overhead, over-temperature and short circuit Auto- when device is back to normal operating Waterproof, moisture-proof & anti-shock protection Industry grade DC 24V to 12V step-down converter, widely used in automotive, electricity, surveillance , railway signals, instruments, solar generate electricity, display screen of bus and taxi, car audio device, security , hospital equipment, telecommunications etc Specification: 1.Input voltage: 13V-40V 2.Limit input voltage: less than 40V 3.Input Current: more than 10A 4.Working Temperature: -20 ~+70 5.Output current: 30A 6.Maximum power: 360w colour: silver Material: aluminum Size: 100x104x40mm Package Contents: 1 x DC 24V to 12V step-down converter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.