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DescriptionOvercurrent protection: Yes (Automatically reduce if input/output voltage is higher than 12A).Short circuit protection: Yes (15A input fuse).Reverse polarity protection: No (Please install diode at the input port).Current voltage IST minimum resolution: 0.05V.Installation: 4pcs 3mm screws.Connection: Welding.Note1. Input circuit: 6-32V. Short input circuit: 3-10V.2. Through the board jumper can choose whether is provided by the input or output the voltmeter supply (IN table is the input, OUT table is the output) lower voltage can reduce the voltage meter loss.3. The jumper can be shorted with a jumper cap, remove the jumper cap, the voltmeter does not work.4. The USB output for 3V or 5V, you can directly charge the phone, it should be noted that when using the USB output, please make sure is the output voltage consistent with your digital product voltage or not. Otherwise it will burn your digital products.5. There might be a bit color distortions due to different computer resolutions.6. There might be a slight error due to different hand measurement.Package included: 1* Step-up Boost Module. Package Including .