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Title: Difficult to program--fails after 2-3 years
Review: Unit worked fine for 2 1/2 years but then failed. It's a little bit difficult to program, but if you read the directions closely and follow verbatim, you shouldn't have a problem.Keep the instructions in a safe place as you will need them to change the code/reprogram when changing battery as the unit loses all information and has to be reprogrammed when you change the battery.
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