The wireless solar or battery driveway monitor with 4-channel voice receiver (STI-V34100 or STI-V34150) detects when a vehicle enters or leaves a protected driveway. Movement of any large metallic (iron or steel) object close to the driveway sensor triggers a signal from the transmitter to the indoor receiver, causing the receiver to sound a voice message. People, animals and shadows will not trigger the driveway sensor. The sensor may be placed as far as 1,000 ft. (line of sight) away from the receiver in a home. It is able to receive up to four signals from additional transmitters.
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