It took about three days for one of our kids to lose theirs outside. We found it in the treehouse after about 20 minutes of tracing our son’s steps in the dark.
It would be wonderful if there were a way to put a Relay into a “lost” mode via the app. Then maybe it could go into a low power consumption mode and have it send out a loud, high-pitched alert every five seconds. I realize this sound could be made by using another relay to whistle into it or something, but this feature would be nice nonetheless.