Install Instructions
1-800-547-5740
www.ueitest.com • email: info@ueitest.com
INSTRUCTION MANUAL
ENGLISH
Wireless Carbon 
Monoxide Detector w/
CO Sensor Self-Test
 REQUIRES Compatible mobile device and the 
FREE downloadable App, “COA2"
C
ARBON
M
ONOXIDE
M
ETER
BT
HOLD
MAX
Apo
ppm
MAX
COA2
COA2
WARNING   : 
The COA2 is an ambient CO detector and not intended for in-flue stream 
uses, to be used as personal safety device or medical applications. Refer to IMPORTANT 
SAFETY WARNINGS section for more details.
FCC INFORMATION
NOTE: This device complies with Part 15 of the FCC Rules and CAN ICES-3(A). Operation is 
subject to the following two conditions: (1) this device may not cause harmful interference. 
And (2) this device must accept any interference received, including interference that may 
cause undesired operations.
INFORMATION TO THE USER
This equipment has been tested to comply with limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection 
against interference in residential installation. This equipment generates, uses, and can 
radiate radio frequency energy and, if not installed and used in accordance with the 
instructions, may cause harmful interference to radio communications. However, there is no 
guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by 
turning the equipment off and on, the user is encouraged to try and correct the interference 
by one or more of the following measures:
•  Reorient or relocate the receiving antenna
•  Increase the separation between the equipment and receiver
•  Connect the equipment into an outlet on a circuit different from that which the 
receiver is connected
•  Consult the dealer or an experienced radio/TV technician for help
WARNING   : 
Any changes or modifications not expressly approved by the manufacturer
could void the user’s authority to operate the equipment.
SYMBOLS
BT
BT/Wireless Connection Low battery
Hold/Capture Value
MAX
Maximum measured value displayed
ppm
ppm/Parts per million
Apo
Apo






