Experience unparalleled protection with the USI Combo Smoke, Fire, and Carbon Monoxide Battery Alarm. Equipped with Sensing Plus Multi-Criteria Detection, this advanced Photoelectric alarm accurately identifies both slow-burning and fast-flaming fires, ensuring early detection and rapid response. An included electrochemical sensor detects carbon monoxide, for a single compact home safety solution. Powered by (2) AA batteries, this convenient alarm can be placed anywhere to ensure continuous protection during power failures. This product features a voice alarm, offering clear guidance differentiating between fire and CO alerts and replacement reminders. Advanced technology reduces nuisance alarms, minimizing disruptions from activities like cooking. Should you experience a false alarm, easily silence it with the test/silence button. With UL certification, you can trust in the reliability and performance of USI Combo Alarms. Invest in peace of mind and protect your loved ones with this advanced home safety solution. With over 50 years of experience as a leader in home safety, USI provides reliable, long-lasting protection for your home.