ITEM NAME:DC-DC Adjustable Boost Buck Module 3W USB Step Up Down Module with Case A#S Product Description Description: DC-DC 5V to 3.3V 9V 12V 24V Adjustable Boost Buck Module USB Step Up Down Power Supply Module with Case Descriptions: 1. As long as there is a phone charger adapter, USB 5V adapter, and you can easily output 1V to 24V adjustable voltage and 3W power. 2. It can also be equipped with a USB adapter board to use Micro USB as input, very convenient to use. 3. Uses multi-turn precision long handle potentiometer. 4. Avoid using a flat-blade screwdriver instead of adjusting it manually. With a beautiful casing, the output voltage display is red. Features: - Low power supply - Wide voltage output - Increase support and buck - Potentiometer adjustment of the long handle Specifications: Input voltage: DC 5V Output voltage: DC 1.0-24.0V Output power: 3W (maximum) Conversion efficiency: 94% Working current: 30mA Operating temperature range: -20 Â ° C ~ 85 Â ° C Operating humidity range: 0%-95%RH Product size: 70mm*25mm*20mm/2.76*0.98*0.79" Package weight: 19g Steps for usage: Plug into a DC 5V USB port; Adjust the output voltage vit the potentiometer to meet your needs; Eliminate the input voltage; Connect the load to the output terminal; Reconnect and enjoy your use. Notes: 1. There may be slight size deviations due to manual measurement, different measuring methods and tools. 2. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. Included: 1 X USB Step Up Down Power Supply Module.Output power: 3W (maximum). - Increase support and buck. Avoid using a flat-blade screwdriver instead of adjusting it manually. It can also be equipped with a USB adapter board to use Micro USB as input, very convenient to use.