I want a battery operated dual alarm.Half the comments talk about wiring and half about battery life. Is this a battery operated alarm or wired?
1852950
This model ( BRK 3120B ), is a 'hard wired' smoke alarm, with a battery back up. I believe all dual sensor ( photo & ion sensor ) alarms are all hard wired as the photo sensor requires a constant electrical power supply for the light. All exclusive ion sensor alarms are battery only powered.
1852951
The alarm works off electricity as the primary and battery as secondary/backup. Could use battery to operate alarm, but better have a good supply of batteries.
1852952
This is a hard-wired alarm w/ battery backup. For a dual alarm powered only by battery, look for First Alert SA320CN Double Sensor Battery-Powered Smoke and Fire Alarm
1852953
Both. The alarms are AC powered with battery backup. You can optionally link each alarm to trigger multiple alarms when one goes off...if the house has been wired with the extra wire for that ability.
1852954
This is actually a wired house current operated alarm with AA battery back-up for power outages.
1852955
This model is wired with a battery backup. You are better off with both power sources as you always have alarm protection.
2066958
This unit does not have anyway to connect to a wired or wireless switch system for doors and windows. It only senses a human being physically walking around in the room that unit is located in. Then it does one of two things. #1. Sounds it's siren and dials a phone number(s) and plays a recorded message to alert the dialed party(s) that the alarm has been tripped. Or you can keep the alarm silent and still have the unit silently dial a phone number(s) and play a recorded message to alert the dialed party(s) that the alarm has been tripped. That's it. With an OBI 100 VOIP Telephone Adapter for about $50.00 and VOIP phone service from PhonePower.com for $35.00 per year and using Google Voice (free) to ring my various phone numbers, I have a very inexpensive, very reliable and very effective burglar alarm system for my home configuration. There is another model that has a remote control that might be more convenient for some people or when installing and working with units in multiple rooms. Hope this information helps.
1431803
There is an internal battery that allows the alarm to operate for some time. The siren in the base unit will sound, but not sirens plugged into wall sockets. I have mine plugged into a UPS, and know it will operate at least 24 hours. It worked fine for me during the last power outage.
627876
The SA521CN is designed to operate as hard wired with other wired smoke alarms,and also connect to wireless "One Link" First Alert alarms. If hard wired you get power from the 110 volt connection. It also has two AA batteries which work when the power is off. There are other wireless models of "One Link" that look similar, use two AA batteries, and wireless connect among themselves and the SA521CN. I alrady had a hard wired system with First Alert connections. I purchased only one SA521CN to replace an existing hard wired only alarm, hard wired it, and also purchased some "One Link" alarms that operate only on two AA bateries. By having ONE SA521CN hard wired, if any alarm goes off--wireless or hard wired only, then ALL hard wired AND wireless alarms go off. Responding directly to the question, I assume this can be used strictly as wireless without a short battery life, but there are other models specifically operating on two AA only. I don't know if the battery life would be shorter on theSA521CN or not, but it will work..
1896346
Sorry, no idea. Assume it is like a watch battery. It didnt have to be wired. Works great...turns itself off.
730722
I ave no idea,really. I was driving, and it had armed itself. When I cut off the power, I was stuck at a shopping center, waiting for AAA to come and get my truck. The funny thing is, the AAA personal who picked me up, knew about alarms ,because he used to install them himself! He took it out there and then, I was able to go home. I knew I should have not bought that alarm! So, I went with a Viper alarm 2 way pager, until I can afford a remote start, then, IPhone comparabilities! I just wanted to ft it to start putting alarms myself. It was a simple process to hook up all those wires you would get from a remote start system! But, even with Al and Ed's hooking up the alarm themselves, it still didn't work good at all. Probably, it could be how sensitive the components are inside. Things aren't what they used to be anymore. Not that that is bad.
1765108
Depends on your system. This unit feeds off my aux battery system. Would take a lot to kill that, and if it did, my alarm kicks on at any voltage lower than 11. But if it did 'go dead', I do not believe that this has an internal battery source.
480560
It is a plug-in with a battery back-up. So it keeps your settings if you have to unplug. It is working well for us. It has an alarm that can be set to ring for a duration of 2 min. or 30 min. We have it set to go off twice a day.
2013368
Hi. I noticed these are in the package. Battery operated and wireless but I did not tried. I am using the PIR sensor operations and happy with the battery endurance and alarm alerting
1524165
This model does not have a battery in it. It gets its power from the main alarm system board. If your alarm system is working everywhere else except this sensor then it would appear that the sensor is not working any more. Make sure the rest of your alarm system is working properly before replacing the sensor. It might just be a loose wire in the sensor circuit.
2164701
I just received my order of 2 CO400 alarms and one had 2 AA batteries and one has a 9 volt battery. I ordered the kind with the 2 AA batteries. I will check what I can do about getting the correct one with the AA batteries.
117136
The outside alarm does not have a battery and must be plugged into anelectrical outlet. It is wireless and will sound when sensor is tripped.
951021
You are correct that wired in parallel as many sensors as desired can be used. The alarm unit will go into alarm if any one of the sensors is triggered.
1122219
To be on the safe side, I change mine when I change the batteries in my smoke detectors. Never had a low battery alarm within that time frame.
1540514
Correct, if the wired alarm is unplugged then it stops sounding BUT the wireless siren continues sounding. The main panel is wireless and has a 72h backup battery, if main panel gets unplugged from electricity then it works on battery, if panel is also turned off then alarm stops working, I recommend you hide main panel, mine is on a second floor ceiling so it's hard to reach. Even if the alarm gets unplugged or destroyed you will get a call or a SMS as soon as it star sounding (if configured). Hope this works :)
1490042
1. Correct. You will need to purchase a two conductor wire (I have 18 ga alarm wire from my local home improvement store) OR you can purchase the Honeywell LT-Cable.2. In my two story home, the unit is across the room from the main entry door. The alarm is PLENTY loud enough for a 2000 sq ft home. The additional sirin really succeeds at letting your neighbors know the alarm was triggered.The alarm remote is radio based and can work through walls. When the remote is used, the main unit beeps one time, very loudly to let you know the status has changed.
2255232
I think you have to activate the alarm for it to function. I did not activate the alarm. It is easy to tell when the power supply kicks in on battery power because of the increased hum from the inverter. There may be a bell that dings once when the inverter is active.