Universal Security Instruments Hardwired (with Battery Backup) Ionization Interconnected Natural Gas Combination Smoke and Carbon Monoxide Detector

Extreamly poor mounting to base

Mounting tabs broke off of the unit as I twisted it in place. Very poor design

Maximum Protection

This is a 4-in-1 unit that protects against fires, smoke, carbon monoxide and natural gas. It is hard wired and has a 9v battery back up. This is the only one I found that provides complete coverage.

Easy installation, works as designed.

The product has been great for 7 years; this order were replacements. Easy to install and test.

false alarms and terrible customer service

While the product may perform as advertised, it failed after 2 years. I reset it and cleaned it but the false alarm continued even after taking out the battery and replacing it and taking the unit outdoors. While this happens with all alarms, what is most annoying is that USI customer service is terrible. I called customer service, and I always went to voice mail. I sent an email and I never received a reply. I am still trying. Such poor customer service is sufficient reason to avoid this p...

Do not buy, out of date merchandise

Product is adequate but when a product with an expiration date sits on the shelf for 1 1/2 years after manufacturer it is not acceptable. The product was received with a Nov 11, 22 manufacturer date and a replace by 2029 product end of service date. That means the detector at best would have a 6 year and 2 month life if received on the manufacture date. Not good for a product that advertises a seven year warranty on the front of the package. It is even worse when received from Lowes in June ...