2 pack Hathephs Combination Smoke and Carbon Monoxide Alarm

2-in-1 Protection: Protect your home from two potentially deadly threats with the electro-optical smoke sensor and electrochemical CO sensor equipped in this smoke and CO detector. Built-In 10-Year Battery: Enjoy uninterrupted 24/7 protection with the built-in 10-year lithium battery that eliminates the need for frequent battery changes and saves you the hassle. High Sensitivity & Accuracy: Feature faster response times and fewer false alarms with the upgraded photoelectric and electrochemical sensors that significantly improve alarm sensitivity. Ultra-Thin Design & Large Button: Compact at Ø 4.7 x 1.1 inches, this slim carbon monoxide smoke detector combo is perfect for travel. Muting or testing the alarm is a breeze - simply press the cover with a broom (the button is the entire top cover). Quick Installation: Simple installation of this smoke and carbon monoxide alarm on any wall or RV using the provided adhesive tape or screws. It's so easy that even adolescents can install it independently.