Product description 2 in 1 Detection Smoke and Carbon Monoxide Alarm Product Functions Normal Operation & Troubleshooting – Working State LCD Screen Readout When there is no data, the screen is dark and the green light flashes;When data is detected, the screen will display numerical values. Audible and Visual Alarm 85 db alarm and flash indicator lightTest ButtonRegularly check that the product is in working condition 4 level :Alarm sensitivity CO alarm sensitivity & time Alarms have a certain threshold and will sound when a dangerous concentration is detected. If the product has been in a prolonged alarm state after detecting an abnormality, please contact provider (company) to confirm the method of resetting. Some buyers get the product and due to incorrect analog testing, the product does not detect a value from where it cannot sound an alarm. And the alarm of the siren needs to have a certain threshold value in order to sound the alarm, because too low a value will not trigger the sensor to work. This is also a design to prevent false alarms. 360 ° All-round Detection High Sensitivity Photoelectric SensorHigh Stability Electrochemical Co SensorA good helper for family protectionMulti Scene ProtectionSuper Easy Install Package list 1 x Smoke & Carbon monoxide detector.1 x holder shell2 x screws.2 x expansion pipes.3 x AA batteries1 x user manual (English） Comprehensive Protection in One Device: This smoke and carbon monoxide detector gives you peace of mind by providing two essential safety features in one convenient unitInstant Smoke and CO Detection: Equipped with advanced photoelectric and electrochemical sensors, this smoke detector carbon monoxide detector combo provides immediate detection of harmful levels of smoke and COLoud and Clear Alarms: With an 85 dB alarm and visual indicators, this smoke & carbon monoxide alarms ensure that you’re immediately alerted to any potential dangerEasy to Install with Minimal Maintenance: Installing this detector is a breeze, and it requires little upkeep to maintain its reliable performanceLow Battery Warning System: You’ll be notified when the battery is low, ensuring that you’re never caught off guard
