Amazon offers its Prime members the Kidde Carbon Monoxide and Smoke Alarm model no. KN-COSM-B, for $21.75 with free shipping. Non-members can spend over $25 for free shipping; otherwise, shipping adds $5.39
Product Features
- Talking alarm announces the hazard type detected, helping to speed up reaction time
- A single unit can be installed where previously two were needed
- Battery safeguard ensures the unit cannot be accidentally mounted without batteries installed
- Test-reset button tests alarm circuitry and triggers the voice announcement
- Meets requirements of Underwriters Laboratories (UL), an independent facility that tests products for safety compliance
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