Kidde KN-COPP-3-RC - Manual (Page 35)

The model number and assembly number can be found on the label on
the back of the alarm.
For Warranty Service:
In many cases the quickest way to exchange your alarm is to return it
to the original place of purchase. If you have questions, call the Kidde
customer service department at 1-800-880-6788 for assistance.
Please send products and all other correspondence to:
Kidde
Attn.: Customer Service Department
1394 South Third Street, Mebane, NC 27302
Questions or for more information, call our Consumer Hotline
at 1-800-880-6788
or contact us at our website at www.kiddeUS.com
Kidde, 1394 South Third Street, Mebane, NC 27302