Description 5Pcs 2A DC-DC Step Up Boost Module with TYPE-C-USB Boost Module: With TYPE-C-USB voltage input, you can get 9V 12V 18V 24V voltage by simply connecting the USB power adapter. Note: This is a boost converter module, so the output voltage should be at least 2V higher than the input voltage! Adjustable voltage: The power setting module has DC 2-24V input and 5V-28V adjustable voltage output, and the power conversion efficiency is as high as 93%. Every time a voltage is passed, it remains at the voltage you set, not automatically reset, and does not bother you to adjust each time. Widely used: These boost boost converter modules can be used to fix emergency lights, electronic equipment, DIY a mobile power supply with adjustable output, boost chargers, etc. Widely used in batteries, power , DIY adjustable regulated power supplies, industrial equipment, 5V, 9V, 12V, 28V output, etc. Note: The maximum output current is 2A. Please rotate 15 times clockwise before use. This is the direction to increase the voltage. When it reaches the stroke, it starts to make a clicking sound. Then you can turn it down to the voltage you want. Input voltage: 2V-24V Output voltage: 5V-28V Efficiency: 93% Output current: 2A Due to different batches, there may be differences in product appearance and printed text, which not affect use. Colour:As Shown Material:plastic Package Contents: 5 x Boost converter with TYPE-C-USB Only the above package content, other products are not included. Note: Light reflection 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.