About This Efficient Smoke and CO Detection: This smoke detector carbon monoxide detector combo uses advanced sensor technology to detect both smoke and carbon monoxide, providing comprehensive protection Real-Time Alerts for Immediate Action: With LED lights and an 85 dB alarm, this smoke and carbon monoxide detector provides real-time alerts so you can act quickly when danger arises Precise Detection Technology: Features a high-sensitivity photoelectric sensor and electrochemical sensor for accurate, early detection of smoke and CO Easy Installation with Long-Lasting Battery Life: Powered by 3 AA batteries, installation is quick and simple, and the battery lasts for an extended period, ensuring continuous protection Compact and Stylish Design: This sleek detector is small and stylish, fitting seamlessly into any home or office environment without taking up unnecessary space Overview Brand : OLUNCLE Style : Smoke Combination CO Alarm Power Source : Battery Powered Product Dimensions : 1.37"D x 4.21"W x 4.21"H Item Weight : 1.2 Pounds Alarm : 85dB Number of Items : 5 Manufacturer : OLUNCLE