I. features: Power supply: AC220V or 9V battery power supply Working current: the static current was less than 10uA Operating current is less than 12mA Smoke sensitivity: level 1 Operating temperature: -10oc ~+50oC Working humidity: 10%-90% Buzzer level: more than 85 decibels at 10 feet Ii. Installation: Choose an appropriate installation area, according to the hole that installs bracket to go up in the ceiling or two holes are delimit on the wall, drill two holes in two holes, two plastic peng in two holes fill up screw. Then press the back of the mounting plate against the wall, insert and tighten the mounting screws until the mounting bracket is removed firmly. The detector is an airtight device which is not allowed to be opened. Please insert the battery into the battery rack of the machine. Position the back of the probe against the mounting port, turn clockwise, and make sure the mounting card is screwed to the bottom. Press the test button gently to check whether the detector is working properly. Iii. Procedures for work, testing and maintenance: The detector is already in working state after installation. In this state, the led on it flashes every 45 seconds. When the combustion particles are detected, the detector will send out a clear and loud pulsating alarm sound until the air is fresh and clean, and other connected alarms will send out an alarm sound. Test: press and hold the test button, a loud and clear pulsating alarm signal will be sent out. This means that when the detector is actually working, the light-emitting diode flashes quickly and other connected alarms emit an alarm sound. The detector can also be tested by blowing smoke into the chamber. The test is done once a week to make sure the detector works reliably. Iv. Avoid installation in the following locations: 1. Being too close to doorways, Windows, fans, etc., can affect the alertness of an alarm, as air generally circulates faster in these places. 2, Do not install in places with high tide humidity, such as bathrooms, or where the temperature is above 50oC or below -10oc. V. simple maintenance: Clean the alarm every 6 months to maintain a good working efficiency. Remove the battery and dust it with a soft brush before installing the battery. If the following problems are found: 1. Press the test button but do not make a sound 2. Smoke test but no sound 3, prepare the light no longer hidden flashing The following can be tried for improvement: 1. Check whether the power supply is working normally 2. Simply clean up 3. Please ask an electrician for a thorough inspection If the above measures cannot improve the situation, please do not attempt to repair. If the alarm is still in the maintenance period, please return it to us together with the proof of purchase date (invoice). Note: abnormal temperature may lead to false alarm. Just make the air circulate in the space and the alarm will stop for a while. Dust can also reduce the sensitivity of the alarm. Please use the above cleaning method for improvement. Vi. Work and test procedures: When the controller is powered on, it will be in the working state. In the working state, the led will blink every 45 seconds. When the smoke is detected, the detector will send out clear pulsating sound and light alarm until the smoke dissipates. Press the test button and hold, the smoke alarm will send out clear and loud pulsating alarm signal, and the led will flash quickly; Blow the smoke into the detector and it will send out a warning signal. Vii. Matters needing attention in installation and maintenance: 1. It shall not be installed in places with high temperature and wind speed, or the sensitivity will be affected; 2, in order to keep the sensor working efficiency is good, every 6 months to clean the sensor, first take off the battery, then use a soft brush to sweep dust can be, then put the battery on the power supply. Viii. Warranty: The company on the alarm products from the date of purchase within one year, under normal conditions of use, free warranty or replacement due to quality problems, after a year of repair or replacement only charge cost (please bring the warranty card).