1.Comprehensive Monitoring: This carbon monoxide carbon dioxide detector measures carbon monoxide, carbon dioxide, temperature, and humidity, displaying data clearly on a 1.5-inch HD color screen. With a 2-second refresh rate, it quickly assesses CO/CO2 levels and overall air quality for real-time safety . 2.Compact and Portable: Designed for convenience, making it easy to carry. It features a sturdy lanyard for hanging on walls, backpacks, tents, cars, or RVs. 3.Long Battery Life: Equipped with the latest battery technology and energy-efficient sensors, this CO CO2 detector alarm temp humidity sensor operates up to 10 hours. 4.Customizable Alerts: The CO CO2 temperature humidity detector provides real-time CO/CO2 monitoring with adjustable alert settings. Default alarm levels are 150ppm for CO and 1500ppm for CO2, but users can customize CO levels from 0-1000ppm and CO2 from 400-5000ppm. 5.Versatile Usage: Compact and portable, this portable gas detector is ideal for both outdoor and indoor use. Perfect for bedrooms, living rooms, kitchens, basements, and essential for travel, hotel stays, vehicles, RV trips, camping, picnics, business trips, barbecues to air safety. Measurement Accuracy: 1 ppm Carbon Monoxide Measurement Value: 0-1000 ppm Carbon Monoxide Excess Alarm: (Initial Default Value) 150 ppm Carbon Dioxide Measurement Value: 400-5000 ppm ( 50 ppm+5%) Carbon Dioxide Excess Alarm: (Initial Default Value) 1500 ppm Temperature: -10-50 (1.5)/14 - 122 (2.7) Humidity: 0%-95%Rh (5%RH) Battery: Built-In Lithium-Ion Polymer Battery (3.7V, 1000mAh) Charging Time: 1H Battery Life: 8-10H Input: Type-C, DC 5V Storage Temperature: -20C-55C/-4F-140F Colour:As Shown Material:ABS Package Contents: 1 x Tester 1 x Type-C Charging Cable 1 x Lanyard 1 x Chinese and English instruction manual 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.