This Hispec Mains Smoke Alarm is a reliable and high-quality device that is perfect for any business or industrial setting. The alarm is interlinked and connectable, making it easy to instal and manage. With a 240V power supply, this smoke detector is always ready to go. In addition, the device comes with a 9V battery back-up, ensuring that it can continue to function even during power outages. The Hispec brand is known for its top-quality products, and this smoke alarm is no exception. It is perfect for anyone looking for a reliable and efficient device to protect their property from fire damage.