New Blackt Electrotech: Fire/Smoke Detection Sensor with Alert Alarm It can install and maintain easy for residential smoke alarms, It is cost effective expensive ways to provide warning early stage when a fire starts begin. It protect worming by loud alarm up to 85 dB prevent injuries and minimize property damage from Fire. When the chamber is filled with a certain density of smoke, it immediately raises an Alert, which helps to take necessary action regarding the Fire Break. Uses of Smoke Sensor are suitable for Offices, House, Hospitals, Hotels, etc. Features: Easy to use & Installation. Loud Alarm upto 85dB alarm signal. Flashing LED indication. Color: White Test button for easy recommended monthly testing. It can install Ceiling or wall Low battery warning QUALITY CONTROL STANDARDS: Operating Volt: 9 Volt (not included) Battery or DC 12V (Network type) Static Current: less than 10 uA Alarm Current: less than 20-25 uA Sound Level: upto 85dB alarm signal. Operating Temp: -10 ~ +50 Deg C Opering Ilumidity:less than 95% RII Detecting Area: 25 Sq Mtr Installation 1) Choose a suitable area & drill to holes ceiling or wall as the bracket site. 2)Put bracket screws & stick the bracket, Plug 3)Put 9 Volt DC battery inside unit & fix unit to the plate. 4)Press Test button unit working normal or not 5)After installed unit it will working state the LED will flash one time a minute, when some burning modes are detected, It will give out ringing & loud Whistle until the are density in balance. PACKAGE INCLUDES 2 x Smoke Alarm Module 2 x Ceiling mounting plat 4 x Mounting Screw 2 x User manual Bill