Bell Passage Alarm Wireless Alarm System With Motion Detector Communication Range Between The Infrared Sensor And Receiver Is Up To 100 Meters (Fair Game). Alarm System With A Total Of 38 Different Ring Tones To Greet Your Guests. 3 Levels Of Volume Control: Loud, Medium, Quiet. 2 Alert Mode: Ring Tone + Led Lighting Or Only Led Lighting. . The Range Of The Sensor Is 3 To 7 Meters Vertically And 3 To 5 Meters Horizontally. . Sensor Supply Operation: 3Xaaa Batteries Or 5V Usb Power Supply (Not Included), Receiver Supply Operation: Dc 110V 240V Or 5V Usb Power Adapter. . Receiver Dimensions: 76X80X33Mm, Sensor Dimensions: 80X59X45Mm. Perfect Motion Detector Alarma For Windows, Doors, Garage Doors Or The Like And Therefore Fits In The Home Or Shop .