Onlinegymshop.Com Driveway Patrol Alarm System – Wireless; 400 Feet Range

Use to monitor the mailbox. garage. driveway or countless other places. Battery operation and 400 foot range means no wiring is necessary. When a vehicle or person passes the sensor. the receiver emits a pleasant chiming sound.FeaturesCompletely wireless infrared alert systemPlace the sensor anywhere on your property and the receiver anywhere in your house up to 400 feet awayReceiver makes a pleasant chiming sound when sensor is crossedReceiver uses 3 C batteries and transmitter uses 1 9V battery