Hardwire Alarm

I want to hardwire my ring alarm using an adapter purchased from Amazon ([https://www.amazon.com/HOMREE-Converter-Module-Output-Adapter/dp/B01MEESLZ6](https://www.amazon.com/HOMREE-Converter-Module-Output-Adapter/dp/B01MEESLZ6)) which many others have used. The question is, the powerline power source says 120 vac / 9 VAC. Is this too much power? The alarm tends to make a odd sound during entry/exit delay when plugged in as compared to using Rings power adapter.