Automatic electronic calibration Measurement range: -120/+20°CPR Calibration accuracy: ±2°C for dew point/frost temperature Automatic conversion to ppm(v), ppb(v), ppm(w), g/m, etc. Data acquisition Uses rechargeable batteries, operates continuously for over 150 hours from full charge. Multi-level preventive protection for accessibility Electromagnetic compatibility EMC, CE certified User-friendly, weight 1.2 kg. Comes complete with accessories and user manual. Certification ATEX