Alarm Chime Doorbell Wireless Infrared Monitor Sensor Detector Entry Door Bell
Wireless Infrared Monitor Alarm Entry Doorbell ChimeMelody:  for AliceFeatures：Wireless door chime is great for retail store, shops, business, salons, front / back / side door, etc. Attach this infrared alarm anywhere you want and instantly know when someone crosses the beam.Infrared sensor detects motion and sends a signal to the receiverWireless installation, just place the sensor at the entranceReceiver requires 2x AA batteries, transmitter requires 1x 9V battery (batteries not included)Send audible chime sound, alerting you that somebody is approachingWorking Range: Up to 100 meters / 328 feet between receiver and transmitterTransmitter Size (L x W x H): Approx. 3.5 x 2.4 x 1.8 inchReceiver Size (L x W x H): Approx. 3.5 x 2.6 x 1 inchReceiver Switch Setting: High / low volume / offMaterial: PlasticPackage:1 x Wireless Doorbell