Features: Advanced Electrochemical Tester: Experience precision and reliability with our state-of-the-art electrochemical technology for accurate carbon monoxide detection, providing peace of mind in safeguarding your environment. Wide Measuring Range & Accuracy: Accurately measures carbon monoxide levels from 0 to 999 PPM with an accuracy of ±50 PPM or 5%, perfectly suited for varied environments and diverse needs. Temperature and Humidity Monitoring: Offers comprehensive environmental data by measuring temperature from -10 to 50°C and humidity from 5 to 95%RH. Long Battery Life with Fast Charging: Features a 400mAh battery lasting 18-40 hours, recharging fully in just 1 hour via USB Type-C port for convenient, uninterrupted usage. User-Friendly Interface: Includes a vibrant TFT screen for clear viewing, easy switching between Fahrenheit/Celsius, and a straightforward one-touch calibration process for effortless operation. Specifications: Model: XYZ-123 Tester Technology: Electrochemical Carbon Monoxide Measuring Range: 0 ~ 999 PPM Carbon Monoxide Measurement Accuracy: ±50 PPM or 5% Temperature Measurement Range: -10 ~ 50°C Humidity Measurement Range: 5 ~ 95%RH Battery Capacity: 400mAh Battery Life: 18-40 hours Charging Time: 1 hour Charging Mode: USB Type-C Product Size: 15x26x68MM Body Material: Aluminum alloy Screen Material: TFT color screen Optional Color: Black, Gold, Silver, Gray, Orange Package Includes: 1 x Carbon Monoxide Tester (Color of your choice) 1 x USB Type-C Charging Cable 1 x User Manual