HAKINAKU Portable CO Detector Carbon Monoxide Alarm, Mobile CO Detector CO Warning Device, CO Meter with Temperature & Humidity Display, for Travel Camping, PTH-10D-Green

["Multifunctional & Portable: This CO detector is a 3-in-1 combined device for carbon monoxide, temperature, and humidity. The compact and portable design makes this CO detector very suitable for use in cars, RVs, or while traveling. It can protect you from carbon monoxide poisoning anytime, anywhere.","High-Precision Carbon Monoxide Sensor: This CO detector uses the principle of electrochemical reaction to quickly and accurately measure the CO concentration. The built-in carbon monoxide sensor has high accuracy and a long lifespan. It is certified with EN-50291 (EU standard for CO detectors) and provides high reliability.","LCD Screen & Audible Alarm: All measurements are updated every two seconds and displayed on a high-resolution LCD screen, making the CO concentration visible and easy to read. When the CO concentration exceeds 50 ppm, this CO detector emits an audible alarm.","Built-In Rechargeable Lithium Battery: The built-in 1000 mAh battery can keep this CO detector operating continuously in standby mode for approximately 100 hours. It supports various fast charging protocols, including QC2.0, PD3.0, AFC, FCP, SCP, etc. You can also keep this CO detector connected to a USB charger at all times to continuously monitor the CO concentration when needed.","Standby Mode: After one minute of inactivity, this CO detector automatically turns off the screen backlight and enters standby mode for energy saving. In standby mode, the CO sensor continues to work and continuously monitors the CO concentration.","ATTENTION: This is a carbon monoxide (CO) detector, not a carbon dioxide (CO2) detector. When you turn on this detector in a normal indoor environment with clean air, it is normal for the carbon monoxide display to show 0, as there is no carbon monoxide in clean air."]