Working Range up to 328 feet (100 meters) between the infrared sensor and receiver allowing you to place it a good distance from the receiver to warn you of arrival and departure of family members, unwanted guests or solicitors, or anyone who visits your home or business Alarm system with a total of 38 different ring tones to greet your guests. 3 levels of volume control: loud, medium, quiet. 2 Alarm mode: ringtones + 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 in delivery), receiver supply operation: DC 110V - 240V or 5V USB power supply. Ideal for front doors, window frames, driveways, walking paths, and anywhere in your home you want to be alerted to motion. Also great to alert business owners that are working in the back, or out of sight, to customers entering their store.Color: 1s + 1r Manufacturer: HommyFine Model Number: 256-gb01 Style: ClassicWorking Range up to 328 feet (100 meters) between receiver and transmitter allowing you to place it a good distance from the receiver to warn you of arrival and departure of family members, unwanted guests or solicitors, or anyone who visits your home or business