Title: Buying this item is like buying a puzzle
Product review: The "user manual" shipped with the parts is not specific for this model. The wiring diagram is for module that does not look like the one I received. Requests for help from Pyleaudio were ignored. There was absolute no operations instructions. If you need instruction to install this item, don't buy it. Diagram showed the sensors should be installed with arrow pointing up. If you do that, you will get an alarm despite nothing is in the way. Install the sensor with the arrow down (opposite to the manual instruction), they work fine. There is no adjustment to the volume of the warning, only on or off. It is very loud.
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