LCD Screen Readout Comprehensive Protection: This smoke carbon monoxide alarms combine the power of two important safety features in one device to protect your family from both smoke and carbon monoxide dangers Reliable Sensor Technology: With photoelectric and electrochemical sensors, this smoke detector carbon monoxide detector combo ensures fast and reliable detection of smoke and CO Visual and Audible Alerts: Featuring 3-color LED indicators and an 85 dB alarm, this detector ensures youre immediately alerted to potential dangers Easy-to-Use and Maintain: The simple design allows for quick installation and minimal maintenance, ensuring continuous protection with ease Ideal for Home and Office: Whether at home or in the office, this carbon monoxide detectors/smoke alarm provides dependable protection from smoke and CO risks