Surveillance cameras with active protection
prices on 177 models— active protection refers to the alarm system built into the camera itself.
Such an alarm can be light (strobe flashes) or sound (siren); many models combine both methods at once. Anyway, active protection performs two functions: it confuses and scares off the intruder, and also draws the attention of others to the situation. The ways of triggering such systems can be different: by a motion detector in the chamber, by a signal from an external sensor, when an attempt to open the case is detected, etc.; on some models, the strobe and/or siren can also be activated manually by the operator.
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