The communication range between the infrared sensor and the receiver is up to 100 meters. 3 levels of volume control: loud, medium, soft. 2 alarm modes: ringtones with LED display and LED display only. Includes 38 different ringtones to greet your guests. Sensor detection range is 3 to 7 meters vertically and 3 to 5 meters horizontally. Receiver dimensions: 76x80x33 mm. Sensor dimensions: 80x59x45 mm. Ideal alarm system for windows, doors, garage doors, and similar applications, suitable for home or shop use. Sensor power supply: 3x AAA batteries or 5V USB power supply (batteries and USB adapter not included). Receiver power supply: AC 110V - 240V. Color: 2 sensors + receiver Specifications: Communication range between sensor and receiver: 100 meters Sensor detection range: 3 to 7 meters Receiver dimensions: 76x80x33 mm Sensor dimensions: 80x59x45 mm Sensor power supply: 3x AAA batteries or 5V USB power supply (not included) Receiver power supply: AC 110V - 240V Package includes: 2x sensors 1x receiver 1x mounting accessories set 1x instruction manual