Title: Wireless Infrared Monitor Sensor Motion Detector Entry Door Bell Alarm Chime. Entry Door Bell Alarm Chime Doorbell Wireless Infrared Monitor Sensor Detector Split Alarm. Door Bell Alarm Chime Doorbell Wireless Infrared Monitor Sensor Detector Entry Bell. New Wireless Door Bell Welcome Alarm Chime Motion Sensor Detector. Features: 100% Brand new and high quality Infrared sensor detects motion and sends a signal to the receiver Wireless installation, just place the sensor at the entrance Send audible chime sound, alerting you that somebody is approaching Working Range: Up to 100 meters / 328 feet between receiver and transmitter Receiver Switch Setting: High / low volume / off Receiver requires 2x AA batteries, transmitter requires 1x 9V battery (batteries not included) Ideal for front door, window frame, driveways, walk paths, and anywhere you need Package Including: 1 x Transmitter 1 x receiver 2 x Mounting Accessories