Reliably detects and alerts you to the presence carbon monoxide in your home with this Carbon Monoxide Detector, which is well suited for all types of living spaces. This detector comes with a clear and easily readable LCD display so it can quickly be interpreted. This carbon monoxide detector updates every 30 seconds. A perfect item for protecting your family from the dangers of carbon monoxide Advanced level of protection, easy to read with the digital display, even in low light conditions. Protect Your Home & Loved Ones Detects levels of carbon monoxide within the home and tests itself automatically. Loud 85db Alarm Alerts of deadly CO gas. The alarm sound is four short alarm beeps. The red LED will flash while in alarm mode. Easy-to-Read LCD Clear LCD display with a blue back ground light. Green LED Flashes every 30 seconds to indicate the unit is operating properly. The green LED will also flash before CO reading is taken and when any button is pressed. Red LED When a dangerous level of carbon monoxide is detected the red LED will pulse and a loud alarm pattern will sound. Alarm Memory If the unit ever alarms, pressing the button, the peak alarm level will be indicated on the LCD. Low Battery IndicatorOne chirp every 30 seconds in an indication that the battery is low (need replacement) (green LED still flashes once every 30 seconds). Specifications Power Supply 3 x AA 1.5V Battery (Not Included) Sensor Electrochemical Sensitivity & Time 50ppm, Alarms Within 60-90Minutes; 100ppm, Alarms Within 10-40Minutes; 300ppm, Alarms Within 3Minutes Standby Current < 50μA (without LCD); < 200μA (with LCD) Alarm Current < 75mA Temperature Range 40℉ (4.4℃) to 100℉ (37.8℃) Humidity Range 20%-90% Relative Humidity (RH), Non-Condensing Product Size 10 x 10 x 4 cm Product Weight 80g Package Size 10.5 x 10.5 x 4.5 cm Package Weight 100g Package Included 1 x Carbon Monoxide Detector, 1 x User Manual, 2 x Screws