Feature: Module Properties: Non-isolated step-down module (BUCK) Input voltage: 4.5-30V (not exceed 30V) Output voltage: 0.8-30V Output current: 0-12A, 100W(If you strengthen the heat sink, it can reach 200W) Operating temperature: from -40 deg; C to +85 deg; c Operating frequency: 180KHz Conversion efficiency: up to 95% Short circuit protection: yes (limit current is 14A) Overheat protection: yes (over temperature automatically shuts down the output) Reverse protection input polarity: none (please install the diode on the input port) Installation: four 3mm screws Wiring: connection: V-IN input, V-OUT output Dimensions: 60x52x20mm Some applications: It is designed to step down voltage. For example, battery, power transformers, DIY adjustable regulator voltage. 24V laptop power supply. 12v to 3.3V, 12V to 5V, 24V to 5V, 24V to 12V, etc. Testing for reference: 12V input, 5V/10A output, 81% efficiency 12V input, 5V/6A output, 8 efficiency