Question 1

How is the unit mounted?  Should it be near the ceiling or near the floor?

Accepted Answer

After spending 40+ years in the car business I have this to say: (everyone seems to be telling what they did or didn't do for a living 😉) I have that if you mount them from one foot above the floor, to one below the ceiling, or even on it..it is still better to have one than NOT to have one! No matter where it is!!
 It's like ANY tester or alarm, if you don't have one..that's when it will get you killed. Either way, most people will end up mounting them where they are out of sight. No matter what the papers or anyone tells you. 
Put at least one on each floor..and pray you never need them. Simple as that!
  Oh..the 40+ years in the car business Taught me this!l, Any idea how much CO is put out into the air of a car dealership over the course of each day, working on from 20-200 cars a day? A LOT! So again, mount it anyplace..but just MOUNT it!
  Good luck to you all.  ;)

Question 2

how is it installed

Accepted Answer

There is  no  installation required. Just put in the batteries as shown and it's ready to go. I move mine from room to room.  You can mount it on a wall if you want.

Question 3

Can the alarm be run with rechargeable NiMH batteries?

Accepted Answer

The User's Guide for this product, and stamped on the item itself, are model numbers of alkalines, (Duracell MN1500 or MX1500; Energizer E91, etc).  However, it does say "Use of a different battery may have a detrimental effect on the alarm operation."  Thank you for calling my attention to this, because the rechargeables I use are NiMH. The item comes with batteries.

Question 4

is it a plug in

Accepted Answer

This is not a plug-in. Operates on 3 AA batteries and acan be easily mounted on wall. Love it.

ASIN	B004Y6V5CI
Alarm	Visual
Best Sellers Rank	1,107,950 in DIY & Tools ( See Top 100 in DIY & Tools ) 472 in Carbon Monoxide Detectors
Brand	Kidde
Colour	White
Customer Reviews	4.7 4.7 out of 5 stars (18,952)
Global Trade Identification Number	00047871088737
Included Components	Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-Copp-B-LPM
Item Dimensions D x W x H	3.8D x 11.4W x 7H centimetres
Item Type Name	Monoxide Alarm
Item Weight	0.58 Pounds
Manufacturer	Kidde
Model Number	KN-COPP-B-LPM
Number of Items	1
Operating Humidity	5% to 95% relative humidity, non-condensing
Part Number	21008873
Power source	Battery Powered
Product Style	Slide-out
Sensor Type	Electrochemical
UPC	785983912532 716080045267 047871088737
Unit Count	1.0 count
Upper Temperature Rating	37.8 Degrees Celsius

Kidde KN-Copp-B-LPM Monoxide Alarm, White

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