Will this coffee urn work the same as the special Shabbat/Yom tov ones?

I bought this from amazon to use as a hot water dispenser for chag/shabbat. Its not the special ones that have a yom tov and shabbat buttons. Can I use this for 3 day chag and leave it plugged into the wall for that long? I reached out to Hamilton beach for info but haven’t heard back yet. If someone knows anything please let me know.