How to stop the alarm (timer) sound when an alarm (timer) goes off? October 12, 2019 08:43 Updated Voice command: "Alexa, stop alarm (timer)." Or press the Action button. Related articles Are there different alarm sounds? Will an alarm I've set go off in case my Wi-Fi (Internet) is down? Can I change the wake word from "Alexa" to some other word? Do you need an Amazon Echo device in order to use Reason ONE? Can I power my Reason ONE alarm clock using a portable power bank? Comments 0 comments Please sign in to leave a comment.