Nextrox DC/DC Converter Regulator 24V Step Down To 12V 20A 240W Low Voltage Transformer Waterproof Brand-new, die-cast 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 100% Waterproof IP68, 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