We have had a few of all kinds of the timing buzz boxes down through the years. When we picked one of these up 10-15 years ago, we have come to use it and have gotten read of the others. Only one hint to make its life last. When you get through with it that day, "take the battery out" and leave it out tell you use it again, then put it back in.
Yours, R.E.A. III #80888