Your UPS-MT-monitor is designed for remote monitoring of power MikroTik routerboard, which have the supply voltage in range from 10V to 28V. (the models of MikroTik routerboard: B411/411A/411AH, RB433/433AH/433UAH, RB450/450G, RB33, RB493/493AH)
UPS-MT-monitor, in conjunction with the AD-55 (AD-155), form a system of uninterrupted power supply MikroTik routerboard.
http://tandem.ck.ua/ups_mtm-eng.php
This can be useful for notification in case of problems with nutrition.
For details on configuring Dude to work with the UPS monitor, Eng. - http://tandem.ck.ua/dude-eng.php