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Sale price USD $17.10 Regular price
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Multi-criteria detection
Smoke and carbon monoxide sensors conform to new UL 217 8th Edition standards
Hardwired with lithium-free 10-year battery backup
Tamper-proof design prevents battery removal
No batteries to change-ever
Lithium-free 10-year battery backup
Alkaline batteries are safer and more eco-friendly
LED status indicator
Inter-connectable up to 24 USI units
Base diameter: 5-5/8 in.
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