The Daewoo Optical Smoke Alarm utilizes advanced optical technology to quickly detect the presence of smoke, providing an early warning in the event of a fire. It's easy to install and reliable, offering peace of mind for safeguarding your loved ones and property. The device measures 101mm in diameter and 34mm in depth. It requires a single 9V battery, which is included. A low battery warning is also available. A flashing red alarm indicator helps to alert you in case of a fire. The smoke alarm is supplied with wall plugs and screws for easy installation.