The solar powered Wireless Driveway Monitor detects when a vehicle enters or leaves your driveway. It uses a solar powered patented magnetometer sensor system. Movement of any large metallic (iron or steel) object close to the driveway sensor will transmit a signal to the included 4-Channel Voice Receiver, causing the receiver to sound a programmable voice message. The receiver offers ten tones/tunes and 53 selectable words (available in English or Spanish).
People, animals and shadows will not trigger the driveway sensor. The sensor operates up to 1000' (line of sight) from the receiver in your home. Additional sensors may be required for wide driveways exceeding 12 feet or to monitor an additional driveway.
Everything you need to know about the STI 4-Channel Voice Receiver