The two SA-29-5 smoke detectors from Alecto are a perfect safety accessory for homes, offices or caravans. It can save lives and provides more safety for you, your family and your property. It detects smoke indoors at an early stage and warns you of possible dangers in good time with a loud, piercing alarm signal of over 85 dB. The smoke detector is powered by a 9 V battery and is equipped with a low battery indicator. In addition, it also has a mute button in case the alarm is accidentally triggered. Included are two Alecto smoke alarms, perfect for your home and garage! All mounting accessories are also included. SKU:438036.