I used this for the Honeywell Home RPLS740B1008 Econoswitch 7-Day Programmable Light Switch Timer decorative style so people couldn't access the programming buttons (since the lighting is from a timer controlled). The concave shape is useless in this situation as the clear cover makes light contact with the raised surface of the timer, but this hasn't caused any problems for me (your experience may vary). It would be nice if there was a version without a concave surface, but this product suited me. It looks decent and clear allowing the timer screen to be seen and the bottom hole was close enough to be able to press the timer on/off button.
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