?Dual Functionality? The GS886 combines smoke and carbon monoxide detection capabilities, providing comprehensive home safety protection against these two common hazards. With one device offering dual functionality, it enhances home safety while reducing the need to install multiple alarms. | ?Accurate Alarming?The GS886 smoke and carbon monoxide detector uses photoelectric smoke sensing technology and has undergone rigorous testing and certification to meet UL 217 and UL 2034 standards, ensuring high accuracy and reliability. It promptly issues warnings, protecting you from the threats of fire and carbon monoxide. | ?Do Not Disturb Mode?When the GS886 smoke alarm and carbon monoxide detector detects low battery or a fault, simply pressing the button will put the alarm into Do Not Disturb mode for approximately 10 hours, preventing nighttime alarms and frequent flashing, ensuring your sleep is not disturbed. | ?Self-Check Function?The GS886 smoke detector carbon monoxide detector combo automatically checks every 80 seconds to ensure all sensors, alarms, and battery functions are operating correctly, preventing issues from being overlooked or forgotten. If a problem is detected, the alarm will alert you to perform maintenance or replace the device, ensuring it remains in optimal working condition. | ?Unique Voice Speaker?Unique smoke detector and CO detector alarms distinguish between smoke alarms and CO warnings. Co alarm: ''Warning, carbon monoxide, evacuate! Smoke alarm: ''Fire!'' . Verbal warning system reduces confusion and helps people maintain order.