Features: 1.Support a wide input voltage range from 3V to 20V with high adaptability 3.Maximum output current can be up to 3.5A, providing sufficient power for high power equipment. 4. Small size and light weight, easy to embedded in a variety of equipment or DIY projects to save space and enhance portability. 5. No need for complex settings, for electronic enthusiasts and professional developers, is the ideal power management solution Product Description: Adopting original big brand chip, Samsung capacitor input and output up to 3.5A (output not more than 3.5A when buck, input not more than 3.5A when boost). Built-in 4 low resistance MOS, so that the module can be in a very small volume to achieve a larger power lift voltage output, the module ultra-low power consumption also makes it possible to apply in battery-powered applications. Parameter: VIN+: DC input positive 3V-20V GND: DC input negative terminal, connected with the output negative terminal OUT+: DC output positive GND: DC output negative terminal, connected to the input negative terminal. EN (on the back of the board): module work enable, low level off, the default output work Maximum 3.5A working current 0.1mA quiescent current 50μA shutdown current Up to 95% conversion efficiency 450KHZ low ripple Output short circuit protection Built-in over-temperature protection