【Fast and Accurate Detection】The carbon monoxide detector is equipped with an advanced electrochemical CO sensor, providing high-precision alarms for quick and accurate detection of carbon monoxide levels. When the carbon monoxide concentration exceeds the set value, an alarm exceeding 85 decibels will be triggered. To ensure complete protection, place one on each floor of your home and in every bedroom. 【Wide Applicability】The carbon monoxide detector is suitable for any location where carbon monoxide may be produced, such as your kitchen, bedroom, bathroom, warehouse, hotel, car, parking lot, or BBQ. The portable carbon monoxide detector is powered by 2 x 1.5V AAA batteries (not included), making it easy to use with just one button for test/reset. 【LCD Digital Display and LED Indicators】The carbon monoxide detector features an LCD digital display that shows real-time CO levels, allowing you to see any significant changes in CO levels, and can display battery life, prompting you to replace the batteries. The intuitive LED indicator clearly informs you about the CO operating status. Alarm Detector: Green LED indicates normal operation, Red LED indicates alarm status, and Yellow LED indicates malfunction. 【Portable and Easy to Install】The carbon monoxide detector is simple to install without any wiring. It can be mounted on any wall or ceiling, as well as in a car. This CO detector includes mounting brackets, screws, and anchors, and comes with 3M adhesive. It's not only an ideal carbon monoxide detection device for home use but also a must-have for cars or travel. 【Quality Assurance】All CO detectors have been rigorously tested and meet UL standards. If you have any questions about our CO detectors, please feel free to contact us. (Note: When testing the detector, do not blow gas directly into the hole.) Specifications: Item: Carbon Monoxide Detectors Battery Power: 2*1.5V AAA battery (not included) Sensor: Electrochemical Working Temperature: 0-70°C Working Humidity: relative humidity 10% - 95% Carbon Monoxide Gas Detection Concentration: 0 ~ 999 PPM Alarm Display: LCD display, sound and light guidance Alarm Standard: When the carbon monoxide concentration is detected to exceed 30 ppm, the alarm screen will turn on, and the real-time concentration of carbon monoxide in the air will be displayed. When the concentration reaches 100ppm, the detector will immediately emit a high alarm above 85dB and flash a red LED light for alarm! Package Includes: 1x Carbon Monoxide Alarm 1 x User Manual 2 x Screws 2 x Back Adhesive