9V Photoelectric Wireless Wall-mounted Smoke Alarm Fire Alarm Smoke Detector Sensor Battery Operated

Features: -dust-proof, insect-proof, anti-visible light -dust cover keeps alarm clean during construction -photoelectric technology is more sensitive at detecting large particles fires -indicate red LED light, while 85decibel siren provides a clear loud warning upon detection -perfect mounting system allows for easy installation and positioning -9V battery back-up included for constant monitoring even if there is power failure -detecting area; 40 square meters when installation height between 6-12 meters, 20 square meters when installation height within 6 meters   Specification: Product Type: Smoke alarm Color: White Product Size: 14cm x 4cm Operating voltage: 9V/AC220V Audio alarm: 85Db Battery: 9V back-up battery for at least 1 year Protection area: 6m high Alarm reset: automatic when smoke clears Alarm indication: Red LED flash Alarm type: flash, sound alarm & RF signal Installing way: wall-mounted Weight: 152g   Package included: 1 x Smoke Detector Alarm 1 x Manual Guide