Protection: short circuit for protection, input reverse polarity for protection, over-temperature for protection (over temperature auto cut off the output) Precautions: 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 0.1V. Specifications: Product Name: for DC voltage regulator module Product Type: XH-M404 Voltage mode: PWM modulation Input voltage: for DC 4-40V Output voltage: for DC 1.25-36V Maximum current: 8A (long work proposals 5A) Maximum power: 200W Conversion efficiency: 94% Switching Frequency: 180KHz Size: 70x47x 29mm (LxWxH) Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1xDC voltage regulator module