Often, pressing and holding 1, 0, Stop, or Cancel will either mute the beeping sounds or activate a child lock feature. (The child lock doesn't actually secure the door but disables the control panel, ...
The timer keeps it on for 15 hours a day, so hopefully there's a place in your house where it won't reflect off the TV screen or light up somebody's bedroom." —Mary B. Get it from Amazon for $152.21.