Printelect's Wireless Alert System 2000 is the perfect way to notify poll workers or precinct officials that a curbside voter has arrived. The wireless, motion-detecting sensor operates on one 9-volt battery (not included) and will detect a person or vehicle passing by out to about 50 feet. The sensor will then send a signal back to the receiver up to a 1/2 mile away. Great for election offices, school entrances, fire stations, police stations, and buildings with limited handicap access.
Up to four zones can be monitored with additional transmitters. The transmitters can be programmed so they will each sound a different tone at the receiver.