This smoke alarm has a ten year fitted battery for the life time of the smoke alarm no annoying chirp to change the battery each year. Maunufactured in 2022 but never used. Ensure your home is safe with the HiSPEC Mains Smoke Detector Alarm. With a 10-year battery life and interconnectable feature, this smoke detector alarm is suitable for any home or office. It has a diameter of 12cm and a weight of 162g, making it easy to install and maintain. The HiSPEC Smoke Detector Alarm has a powerful 85 dB operating sound rating and a rechargeable battery. It is manufactured in China and comes with a 5-year manufacturer warranty. Get peace of mind with this easy-to-use and efficient smoke detector alarm.