Introduction 1. The input voltage range of 4-40V, the output voltage range of 1.25-36V.2. The digital display is the output voltage.3. Adjust the potentiometer knob: clockwise to adjust the output voltage is increased; counter-clockwise, the output voltage is reduced; after re-regulate the voltage connected load and prevent damage to the load.4. more than 5A current, please enhance heat dissipation.5. The low voltage display precision 0.01V, high-voltage display accuracy 0.1VProduct Name: DC voltage regulator module.Product Type: XH-M404.Voltage mode: PWM modulation.Input voltage: DC4-40V.Output voltage: DC1.25 ~ 36V.Maximum current: 8A (long work proposals 5A).Maximum power: 200W.Conversion efficiency: 94%.Switching Frequency: 180KHz.Protection: short circuit protection, input reverse polarity protection, over-temperature protection (over temperature cut off the output)Package Included:1PC*XH-M404 DC 4-40V 8A Voltage Regulator Module Digital DC-DC Step Down Voltage Regulator DC XL4016E1 Digital Display