| http://www.w3.org/ns/prov#value | - With three different sensitivity settings, the PIR sensor can detect a person up to 4 , 8 & 12 metres away.The 4 channel receiver has 4- built in chimes, 4 x timed dry relay outputs (which can be used to activate dialers, sirens, lights, speech alarms and other accessories), a 12v DC output (to power sirens & flashing lights), a volume and on/off control and is powered by a plug in transformer usi
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