The communication range between the infrared sensor and the receiver is up to 100 meters (fair game) 3 volume control levels: loud, medium, silent; 2 alarm modes: ringtones + LED display and LED display. There are a total of 38 different ringtones to welcome your guests. The sensor range 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 others and therefore fits into the house or shop! Sensor power supply: 3 AAA batteries or 5V USB power supply (not included), receiver power supply: DC 110V - 240V. Product Descriptions Color: 2 sensors + receiver Specifications: Communication range between sensor and receiver: 100 meters (fair game) Sensor range: 3-7 meters Dimensions: sensor, 80x59x45mm; receiver, 76x80x33 mm Sensor power supply: 3 AAA batteries or 5V USB power supply (not included), receiver power supply: DC 110V - 240V. Scope of delivery: 2x sensors 1x