This STI battery powered Wireless Driveway Monitor detects when a vehicle enters or leaves your driveway.
It uses a patented magnetometer sensor system. Movement of any large metallic (iron or steel) object close to the driveway sensor will transmit a signal to the receiver, causing the receiver to chime and flash.
The sensor operates up to 300m (line of sight) away from the receiver in your home. Additional sensors may be required for wide driveways exceeding 3.5m or to monitor an additional driveway.
4-Channel Voice Receiver sounds programmable message when activated, Receiver offers ten tone/tunes and 53 selectable words.
Not trigger by people, animals and shadows.