Customer Reviews For The 10-Year Battery Combo Smoke, Fire, and Carbon Monoxide Alarm

The Universal Security Instruments USI/SMCO/10YR/V is a 2-in-1 combination smoke and carbon monoxide detector that provides comprehensive monitoring against fire and toxic CO gas in a single unit. Utilizing Universal Sensing Plus multi-criteria detection, this combination alarm accurately identifies both fast-flaming and slow-smoldering fires while simultaneously tracking carbon monoxide levels with an independent electrochemical sensor.

Unlike standard single-tone alarms, the USI/SMCO/10YR/V combination smoke and carbon monoxide alarm features audible voice warnings that explicitly state the hazard detected. In addition to a loud 85 dB siren, the voice warning combination detector clearly differentiates between emergency warnings and end-of-life battery replacement reminders.

No. This combination alarm is powered by a sealed, 10-year tamper-resistant battery. This eliminates battery replacements and low-battery chirps for a full decade, offering 24/7 continuous monitoring even during electrical power outages.

For maximum coverage, install a combination smoke and carbon monoxide alarm on every level of your home, particularly outside sleeping areas and bedrooms. Mount the USI/SMCO/10YR/V combination unit on the ceiling or high on a wall (at least 4 to 12 inches below the ceiling) to catch rising smoke and ambient carbon monoxide efficiently.

Yes. This combination detector is ETL listed and meets safety compliance under UL 217 (9th Edition) for smoke detection and UL 2034 (4th Edition) for carbon monoxide safety. Its multi-criteria sensor technology significantly reduces nuisance false alarms from cooking steam or smoke while fulfilling FHA, HUD, and NFPA residential building code requirements.