This is a simple mechanical timer where you flip the pins up or down to program it. The pins do not move easily and must be gently pressed with a screwdriver. The first timer worked for 3 weeks, then blocked without turning off the light. The second timer did the same two weeks later. To set the time, you have to turn the wheel manually. It also got stuck when setting the time. These timers are pure rubbish, don't waste your money. Fast return. What really works is Century's grounded, replaceable 24-hour mechanical timer. This is the only timer switch sold by Revain that I have had no problems with. Check it.
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