Portable and Easy to Transport: This carbon monoxide detector is designed to be compact and portable, ideal for travel. It easily slips into your bag or luggage, ensuring carbon monoxide protection wherever you go. Alarm Standard: 50 ppm, alarm within 60-90 minutes; 100 ppm, alarm within 10-40 minutes; 300 ppm, alarm within 3 minutes. Continuous Protection 24/7: UL2034-certified and monitored without interruption 24/7, this carbon monoxide detector offers round-the-clock protection against carbon monoxide leaks. Rest assured knowing you and your loved ones are safe from this silent killer. Highly Sensitive Detection: Equipped with an advanced electrochemical sensor, this carbon monoxide meter is highly sensitive to detecting carbon monoxide levels. It can accurately measure concentrations from 0 to 999 ppm, allowing you to act immediately if dangerous levels are detected. LCD Display and LED Indicator: The portable carbon monoxide detector features a clear LCD screen that displays the concentration of carbon monoxide in real-time. Additionally, it has an LED indicator that provides a visual warning when a dangerous level is detected. This ensures you can easily monitor carbon monoxide levels in your environment. Loud Audible and Visual Alarm: When a dangerous level of carbon monoxide is detected, the carbon monoxide alarm activates an alarm of up to 85 dB to alert you. Simultaneously, the red LED light flashes to provide a clear visual warning. This ensures you are immediately aware of the potential threat from carbon monoxide. Specifications: Product Material: Plastic Shell Product Size: 9.5 x 9.5 x 3.2 cm/3.74 x 3.74 x 1.26 inches Product Weight: 75 g/2.65 Oz Product Color: White Power Supply: DC3 V, 2 AA alkaline batteries (not included) Sensor Type: Electrochemical Sensor Life: One year Standby: 20 UA Environmental Conditions: Temperature 5-50 ° C/41-122 ° F, Humidity ≤ 95% RH