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System Sensor 4WTA-B Four Wire Smoke Detector With Built-In 135 Degree Fixed Heat Sensor & Sounder

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4 wire type smoke detectors are compatible with all alarm systems, unlike the less popular 2 wire type. This model is same as the 4wt-b model except it has a...

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$51.00

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4 wire type smoke detectors are compatible with all alarm systems, unlike the less popular 2 wire type. This model is same as the 4wt-b model except it has a built in sounder as well. We're often asked which type we recommend, 2 wire type or 4 wire type. If you are going to have only a few and they will all be on one level, we recommend 2 wire type. On the other hand if you will have smoke detectors on more than one level, will have more than a four or five, or you need them with built in sounders we then recommend the 4 wire type.

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