Question 1

If I plug this directly into the wall does it over both outlets?  I have a nightlight in my hall where I want to place this unit.
Thanks

Accepted Answer

No it will fit in the bottom leaving the top for your night light

Question 2

can it detect levels of 20,30 or 40 ppm of CO?  I know alot can only detect 70 ppm of CO or above...but I'm concerned of a small CO leak of below 70.

Accepted Answer

This unit probably detects CO at less than 30 ppm, but is not allowed to display that level unless a button is pushed. In this case, the peak level the alarm detected since last reset is what will show, not the current ambient level. From 30 to 70 ppm, the display can show the ambient level, but the alarm will not sound until it's been in that range for 30 days, as mentioned. At 70 ppm, the alarm is not to sound for at least an hour, and no more than 4 hours. That's UL requirements, which most codes across the US adhere to.

Question 3

Why would anyone buy a 2-pack for $75.23 when they can buy two 1-packs for $59.94?

Accepted Answer

I'm going out on a limb here but a two pack includes two detectors for 75.23    a single is 59.94.

So if you want two of them you can pay 75.23 or 120.00   I have no idea why someone would spent 75.00 when they could spend 120 for the same items.   Hopefully someone will be able to answer this question.

Question 4

Does this alarm work when using an extension cord or must it be plugged directly into a wall outlet?

Accepted Answer

The instruction booklet that came with my First Alert carbon monoxide alarm (I do not know if I bought a "model C0615" -- my alarm has NO identifying alpha-numeric) informs me that there IS an extension cord already on the back of the alarm; it also tells how to access it.  I unplugged my alarm from the outlet, turned it back-side-up and true enough the 2 pronged plug you use to plug it into the electrical outlet is part attached to a  lightweight extension cord that I would estimate to be about 4 or 5 feet long.  The instruction booklet says that is for use by those who want to remain standing and look at the alarm "face-to-face."  Hope this helps, Fat.

Brand	FIRST ALERT
Style	Plug in Alarm with Digital Display
Power Source	Battery Powered
Color	White
Product Dimensions	3"D x 8.4"W x 6.9"H
Item Weight	4.54 g
Alarm	Audible
Sensor Type	Electrochemical
Global Trade Identification Number	00029054015785
Number of Items	3
Manufacturer	First Alert / BRK Brands, Inc.
UPC	029054015785
Part Number	CO615
Item Weight	0.16 ounces
Country of Origin	Mexico
Item model number	CO615
Batteries	2 AA batteries required. (included)
Is Discontinued By Manufacturer	No
Size	Pack of 3
Pattern	Alarm
Item Package Quantity	1
Included Components	Smoke Detector, batteries, mount, user's manual
Batteries Included?	Yes
Batteries Required?	No
Average Battery Life	8760 Hours
Warranty Description	7 Year Limited

Dual-Power Plug-In Carbon Monoxide Detector with Battery Backup and Digital Display, CO615 , White, Pack of 3

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