carbon monoxide detector uses a high precision DDS sensor to deliver instant 0.3s alerts (1PPM sensitivity) and 0-1000PPM coverage with 10% accuracy, ensuring precise early detection of low-level leaks. Designed for reliability in homes and industrial spaces, it combines speed, broad-range monitoring, and high precision to prevent missed threats carbon monoxide meter supports adjustable thresholds (e.g., 50-200PPM for homes, 40-400PPM for business premises), meeting diverse safety needs across scenarios.Includes value recording (MAX) functions to track hazards for troubleshooting This portable co detector features a 2.9-inch backlit LCD screen that displays real-time co levels with dynamic bar graphs. Additionally, it is equipped with tri-color visual indicators and a high-decibel buzzer. During operation, the indicator light stays green under safe conditions, turns yellow with audible alerts when reaching low alarm thresholds, and switches to red with urgent alarms for high-level CO threats This personal carbon monoxide detector has a ABS body,which is shockproof and long-lasting for cars, camping, or on-site use. Integrated controls (data hold/mute/auto-off/flashlight) + Type-C charging support outdoor operation allow 10 seconds in for automatic calibration upon power-on; 2. Zero calibration requirement: must be performed in uncontaminated air ( & hold SET button). Incorrect calibration may cause inaccurate low readings Package Details: 1 x CO Detector 1 x Storage Bag 1 x Charging Cable Color: As Shown Material: Metal+Plastic Package Contents: 1 set * portable carbon monoxide detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.