[Portable and Compact]: Compact and portable design, ideal for travel. It easily slips into your bag or luggage, ensuring carbon monoxide protection wherever you go. [24/7 Continuous Monitoring]: Provides 24-hour protection against carbon monoxide leaks. Its advanced electrochemical sensor has high sensitivity in detecting carbon monoxide levels, allowing you to act immediately if a dangerous level is detected. [LCD Display and LED Indicator]: Equipped with a bright LCD screen, this portable carbon monoxide detector provides real-time readings of carbon monoxide levels. Additionally, it features an LED indicator that provides a visual alert when a dangerous level is detected. You can easily monitor carbon monoxide levels in your surroundings. [Audible and Visual Alarm]: When dangerous carbon monoxide levels are detected, this carbon monoxide alarm activates with high decibels to alert you and those nearby. Simultaneously, the red LED indicator flashes to provide a clear visual warning. This ensures you receive immediate alerts to potential carbon monoxide threats. [Long Battery Life]: Powered by battery, this carbon monoxide detector offers long-lasting performance. You can count on its continuous monitoring capability without worrying about frequent battery replacements. Rest assured that you and your loved ones are protected from the silent dangers of carbon monoxide. Specifications: CO, Carbon Monoxide Alarm Mode: Step alarm, sound and flash (auditory and visual) Power Source: Power supply with batteries, 3 AA batteries (not included) Electrochemical Working Environment: Temperature 5 to 40 ℃, humidity 20 to 90 % Product Color: White Product Quantity: Set of 2, set of 3 (optional) Product Size: 6 x 6.4 x 2.8 cm/2.4 x 2.5 x 1.1 inches