Universal Security Instruments Plug-in, Carbon Monoxide Alarm, with Battery Backup
Universal Security Instruments Plug-in, Carbon Monoxide Alarm, with Battery Backup
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Universal Security Instruments Plug-in, Carbon Monoxide Alarm, with Battery Backup

|5 ratings

Key item features

  • Clear LCD Display - Easily monitor CO levels and status
  • Audible Alarm - A loud, piercing alarm alerts you to dangerous CO concentrations
  • Tricolor indicator visually indicates alarm status for quick identification
  • Long-lasting battery power operates on (2) included replaceable AA batteries
Current price is $39.97
Price when purchased online
  • Free shipping
  • Free 90-day returns
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Customer ratings & reviews

4.2 out of 5 stars
stars
5 ratings2 reviews
How item rating is calculated
  1. 5 stars80% (4)
  2. 4 stars0% (0)
  3. 3 stars0% (0)
  4. 2 stars0% (0)
  5. 1 star20% (1)
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Showing 1-2 of 2 reviews

Jul 21, 2026
Reviewer name: Mason
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Easy plug in CO unit

Just started using the unit, easy to install, read out on level was 0. No heat on seems to operate fine. Paid $6.98 when I wanted to reorder it was $39, Guess I got a great deal!

Helpful?157GAQJFUXK818186765881
Jul 22, 2026
Reviewer name: anonymous
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

great product that will help me feel safe. These were on clearance for around 6 bucks so i bought one for me and a few more for my family. it comes with battery and built sturdy.

Helpful?157GAQJFUXK818186765881