Protect your home and loved ones from carbon monoxide and smoke with this photoelectric combination detector from First Alert® featuring voice location technology. Battery-operated, its sleek design is only half the size of a standard combination detector, allowing it to blend with more ease into your room's décor. It comes equipped with a photoelectric sensor which is designed to detect signs created by a smouldering fire. It can distinguish easily the difference between cooking and showers versus an actual fire emergency, reducing the false alarms. Also equipped with an electrochemical sensor for monitoring carbon monoxide levels with accuracy. This unit gives you an end-of-life warning after 10 years, so you know when it is time to replace and is perfect for apartments, dormitories or hotel applications. This product is backed by a 7-year limited warranty.