Usage Tips:Communication range between the infrared sensor and the receiver is up to 70 meters3 levels of volume control: loud, medium, quiet 2 Alarm mode: ringtones and LED display and LED display. There are a total of 38 different ringtones to greet your guests.The range of the sensor is 3 to 7 meters vertically and 3 to 5 meters horizontally.Receiver dimensions: 76x80x33 mm, sensor dimensions: 80x59x45mm. Perfect alarm system for windows, doors, garage doors or the like and therefore fits in the household or shopSensor supply operation: 3xAAA batteries or 5V USB power supply (not included in delivery), receiver supply operation: DC 110V - 240V.Specifications:Communication range between sensor and receiver: 70 meters (fair game)Sensor range: 3 to 7 metersDimensions: sensor, 80x59x45mm receiver 76x80x33 mmScope of delivery:1x sensor1x receiver1x mounting accessories set1x instruction manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.