The Guardline Wireless Driveway Alarm Outdoor Weatherproof Motion Sensor & Detector is a versatile security device that can be used to protect your driveway, yard, or any other outdoor area. It features a loud horn and siren that can be heard up to 500 feet away, ensuring that you're alerted to any potential threats. The motion sensor is weatherproof and can detect movement up to 40 feet away. With its easy installation and adjustable settings, this security horn and siren system is a reliable choice for enhancing the security of your property.