The portable 3-in-1 carbon monoxide detector monitors real-time CO concentration, temperature, and humidity. Equipped with high-precision sensors, it detects carbon monoxide levels from 0500 PPM, temperature range of 32122F (2.7F) / 050C (1.5C), and humidity range of 2080% RH (5% RH). The carbon monoxide alarm features a 3-level indicator light based on CO levels: 049 PPM (green flashing = safe), 5099 PPM (yellow flashing = warning), and 100500 PPM (red flashing = danger). The alarm is triggered at 50 PPM by default. Built-in lithium battery supports power supply and fast charging via QC2.0, PD3.0, AFC, USB-C UFP (BC1.2 DCP), and other common protocols with 1065W input. Includes an outdoor lanyard for easy portability, ideal for travel, camping, picnics, and outdoor adventures. Magnetic back allows attachment to metal surfaces such as appliances or vehicles. Color: White Material: ABS Package Contents: 1 x Detector 1 x Lanyard 1 x USB Data Cable 1 x English Manual Note: The package includes only the items listed above. Other products are not included. Note: Lighting reflections and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 13 cm.