What Are the Specifications of the 3-in-1 Safety Alarm?
This alarm is an all-in-one safety solution for detecting smoke, fire, and carbon monoxide (CO) threats in your home. Designed to be hardwired with a battery backup, it provides continuous monitoring, even during power outages. With voice alerts, LED indicators, and interconnectivity with other alarms, it enhances household safety with clear alerts and dependable performance.
Key Areas Covered:
Model Number: USI/SMCO/HWREP
Product Overview
Specifications
Features & Benefits
Installation Requirements
FAQs
Usage & Tips
Specifications:
Power Source: 120VAC 60Hz (Hardwired) with 2x AA Battery Backup
Operating Temperature: 40°F to 100°F (4.4°C to 37.8°C)
Dimensions: 6.1 x 1.6 inches (155 x 41.8 mm)
Voltage: 120V
Warranty: 10 years from date of purchase
Rated Life: 10 years
Mount Type: Ceiling or Wall (surface mount only)
Safety Rating: Conforms to UL STD 217 & 2034
Humidity Range: 10–95% RH (non-condensing)
Sound Output: ≥85 dB at 10 ft
Interconnectivity: Supports up to 18 devices (12 smoke/combo alarms max)
Features & Benefits:
3-in-1 Detection: Protects against smoke, fire, and carbon monoxide threats
Voice Alerts: Clear voice warnings for “Fire!” and “Carbon Monoxide!” in English and French
LED Indicators: Colored lights for power (green), fault (yellow), and alarm (red)
Test/Silence Button: Simple weekly testing and nuisance alarm silencing
Battery Backup: Keeps you protected even during power outages
Interconnect Capable: Hardwire with up to 18 compatible units for full-home coverage
Smart Silence Modes: Temporarily silence alarms for smoke (8 mins) and CO (5 mins)
Alarm Memory: Stores historical alarms and communicates prior issues via voice
Installation Requirements:
120V AC power source
UL-listed junction box
Avoid installation near vents, kitchens, or high humidity areas
Tools: screwdriver, wire strippers, pliers
Do not recess mount. Surface only
Interconnect wiring must follow NEC and NFPA 72 codes
FAQs
Q: Can this alarm be installed without hardwiring?
A: No. It is designed for hardwired installation only.
Q: What happens during a power outage?
A: It uses two AA batteries for backup power to maintain operation.
Q: Will one alarm trigger others?
A: Yes, if interconnected properly, when one detects an issue, all alarms will sound.
Q: Can it detect gas leaks other than CO?
A: No. It only detects carbon monoxide from combustion sources.
Q: How long does the alarm last?
A: It has a 10-year product life from the date of manufacture.
Usage & Tips
Test weekly by pressing the TEST/SILENCE button for over 1 second
Replace batteries annually or sooner if low-battery chirps occur
Clean monthly with a vacuum brush attachment and avoid water or sprays
Don’t paint or block the unit, this affects sensor functionality
Install alarms in all sleeping areas and each level of your home