Description
The GEM-DT is an advanced dual-technology sensor designed for use with Napco's GEM-Series wireless receivers. The unit is powered by four 1-1/2 volt C-size alkaline batteries (supplied). Battery life expectancy is 4 to 5-1/2 years, depending upon the amount of activity in the protected area. When battery voltage drops below normal, a low-battery report will be sent to the receiver.
