Wireless Battery Driveway Monitor
Safety Technology Intl. Inc.’s
Wireless Battery Driveway Monitor detects when a vehicle enters or
leaves a protected driveway. Using a magnetometer sensor system, the
monitor causes the receiver to chime and flash upon vehicle detection.
It may be placed as far as 1,000 feet away from the receiver, is easy to
install, and may work with up to four additional driveway sensors.
Safety Technology Intl Inc (STI)Web Site: