1、This product is made of high quality PCB material, strong and durable. 2、Built-in current limit function, thermal shutdown function, soft start function, and frequency compensation function. 3、It has a voltmeter that displays the voltage operating status in real time. 4、The conversion efficiency can up to 94%, typical efficiency is 85%. 5、Adopting high specification craft, carefully welding, precise hole position, complete functions. Features: This product is made of high quality PCB material, strong and durable. Built-in current limit function, thermal shutdown function, soft start function, and frequency compensation function. It has a voltmeter that displays the voltage operating status in real time. The conversion efficiency can up to 94%, typical efficiency is 85%. Adopting high specification craft, carefully welding, precise hole position, complete functions. Specification: Material: PCB Module Features: Non-Isolated Boost Rectification Mode: Asynchronous rectification Input Voltage: 4.5V-32V Output Voltage: 5V-55V Input Current: 4A (maximum) Conversion Efficiency: 94% (maximum), typical efficiency is 85% Switching Frequency: 40KHz Output Ripple: 50 mV Load Adjustment Rate: ± 0.5% Voltage Adjustment Rate: ± 0.5% Package List: 1 x Module