The module name: 12A buck perfect version The modular nature: non isolated buck module      Input voltage: 4.5-30V input voltage should not exceed 30V!!! Output voltage:1.25-30V continuous adjustable Output current: 0-12A 100W to strengthen the heat up to 200W, Working temperature: -40~+85 degrees Operating frequency: 300KHz Conversion efficiency:maximum  95%(efficiency is related to the input, the output voltage, current, pressure difference) Short circuit protection:have (current limiting 14A) please try not to short circuit Over temperature protection:have (automatic shutdown output ultra temperature) Input reverse connection protection: No, (such as the need to please series diodes in the input) Installation: 4pcs 3mm screws Connection: connecting terminal, without welding, V-IN input, V-OUT output, with the housing modules for welding line output Module size: length 60mm width 51mm high 22mm Scope of application: This module can be applied to the field of the input voltage higher than the output voltage,     such as battery, power transformer, DIY adjustable regulated power supply, 24V vehicle notebook power, vehicle LED lamp with power supply, industrial equipment, buck, 12V to 3.3V, 12V to 5V, 24V to 5V, 24V to 12V etc.