Adjustable: You can adjust the voltage by placing a multimeter on the output in sync with a screwdriver to adjust a potentiometer. Tiny adjustments can be made to achieve precise tension. Applications: DIY power supply for mobile devices, monitor power supply, buggies, camera power supply, car power supply, power supply for communication devices, etc. Input voltage: 4.5V to 28V Output voltage: 0.8V to 20V Output current: 3A (maximum) Conversion efficiency: 96% (maximum) Output ripple: less than 30mV Switching frequency: 1.5 MHz (highest), usually 1 MHz Operating temperature: minus 45 degrees Celsius to 85 degrees Celsius The encoding direction is random and does not affect the use, and does not accept the designation Material:plastic colour:green Package Contents: 20 * Adjustable Power Supply Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.