CO₂Measuring Range 0~2000ppm , 0~5000ppm , 0~10000ppm CO₂Accuracy ±70ppm , ±40ppm CO₂Resolution 1ppm Sampling Interval 2s Working Temperature -30℃~70℃ , Best fit 0℃~50℃ Storage Temperature -50℃~90℃ ESD Protection ±25KV Auto Power Save 5 mins Battery AAA battery × 2 Battery Lifetime ≥20 hours(Without alarm) IP Class IP50 Dimensions 166×58×20mm Housing ABS+PC,flame-retardant,toxicity and halogen ...