Module characteristics (boost module):Maximum output current: 2A Input voltage: 2V ~ 24V Maximum output voltage: 5V-28V Efficiency: 93% How to use + and - 2~24V, the output voltage can be adjusted by adjusting the potentiometer, the output voltage is higher than the input voltage 4. Precautions The input voltage should not exceed the maximum input voltage current output current does not exceed 2A Due to different batches, there may be differences in product appearance and printed text, which not affect use Colour:As Shown Material:PC Package Contents: 8 x voltage booster 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.