GEREE DC-DC Buck Converter 12V/24V to 5V 5A/25W Step-down Voltage Transformer Volt Regulator Power Supply Inverter Module Waterproof Car Power Adapter for Car Auto Vehicle Motor With short-circuit protection, over-current protection, over-temperature protection, over-voltage protection. The module is waterproof, anti-shock, and moisture-proof and has stronger durability. Super-thinsmall size, high efficiency, easy installation and use. Small heating; high transfer efficiency of 96% max.Work temperature: -40+85. It can be widely used in Bus, CMB, large trucks, motor, solar generate electricity, display screen of bus and taxi, car audio device.