Combination Monoxide Detector Operated CST503（2 Review

【Light and Sound Alarm Warning】: The Smoke CO Monoxide Alarms which detects the larger particles of a smoldering fires. When a dangerous level of smoke and carbon monoxide is detected the red LED will flash and the alarm pattern will sound 85-decibel alarm to protect your family's life and property safety from smoke or carbon monoxide, loud warning upon detection. 【Alarm Standards】: the alert time depend the level of carbon monoxide concentration. 50ppm, alert within 60 to 90 minutes; 100ppm, alert within 10 to 40 minutes; 300ppm, alert within 3 minutes. 【Widely Used&Installation】: Battery operated installs without an electrician , more easily and quikcly mount on any wall or ceiling with included bracket,screws.Used for bedroom,living room ,kitchen room,bathroom,hotel, etc with the risk for fire smoke danger area. 【Standarnts and Note】:CO monoxide detector combo standarnt as UL217/2034 . please keep the air fresh for one minute when batteries intalled.