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 0–500 PPM, temperature range of 32–122°F (±2.7°F) / 0–50°C (±1.5°C), and humidity range of 20–80% RH (±5% RH). The carbon monoxide alarm features a 3-level indicator light based on CO levels: 0–49 PPM (green flashing = safe), 50–99 PPM (yellow flashing = warning), and 100–500 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 10–65W 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 +/- 1–3 cm.