Aluminum shell and high quality design, maximum transfer efficiency of 96%. Built-in full protection against over/under voltage input, over-current, overload, overhead, over-temperature and short circuit Auto-recovery 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 systems, railway signals, instruments, solar generate electricity, display screen of bus and taxi, car audio device, security systems, 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: 125mm x 95mm x 40mm Package Contents: 3 x DC 24V to 12V step-down converter Only the above package content, other products are not included. Note: Light reflection 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.