it gives a single loud beep every 10 minutes.

Everything is great except that no matter the alert type you set (voice, display, voice) it still blaring an loud obnoxious beeping.

The radio has a loud beeping alert followed by an announcement about any watches/warnings

and I would have nothing but positive comments (easy to set up, it's loud and clear, has a bright display, etc) but for one irritating feature; if the radio does not receive an alert signal at least every 10 days it will start this annoying beep every few minutes and THE ONLY