The Kidderminster Smoke Alarm Twin Kit 29HD BNWT is a set of two white smoke detectors from the renowned brand Kidde. Each alarm is powered by a battery and comes with one included. These alarms are compact, with dimensions of 3.3cm in depth and 10cm in width, and lightweight at 146g each. They come with a manufacturer warranty of 3 years and are designed to provide essential home security by detecting smoke in case of a fire emergency. Perfect for ensuring safety in any household, these smoke alarms offer peace of mind for you and your loved ones.