Hello Austris，

We are sorry to hear that. There is no factory reset setting.

To get better calibration result, please find one adjustable power supply. If you use two different power supplys, it is hard to calibrate “10V” and “40v”  at the same time.

For any more questions, please let us know

Best regards,

DROK

Hello Sultan Alboabdulla,

We  replied to you in the below post. Would you pleaset tell us which item it is?

Best regards,

DROK

Hello Tyson Mitchell,

Buck converter can’t increase votlage. If you need to step up voltage ,please choose boost converter.

Best regards,

DROK

Hello Sultan Alboabdulla,

Would you like to offer product link or SKU number so that we can confirm which one it is?

And did you set timing unit?

Best regards,

DROK

Hello Bud Stewart,

You  just need to set alarm value as 000.0.  Then alarm feature will be disabled.

Any more questions, please let us know.

Best regards.

Hello Sean Elledge,

Are you talking about this item, #2001710003? https://www.amazon.com/dp/B07759SLYP?ref=myi_title_dp

Is the voltage reading correct? And is there any device drawing power from battery?

Best regards.

Hello Lindsay，

Would you like to offer product link or SKU number so that we can confirm which item it is?

Best regards,

DROK

Hello Jeff,

We have pdf manual on Amazon product details page,  here is the link, please feel free to download it.

https://m.media-amazon.com/images/I/C1qiCZ9VrES.pdf

Best regards.