1. Dual display of humidity and temperature with backlight. 2Measure dew point and wet bulb temperature. 399 record storage capacity, ergonomic design, and protective leather case. 4 fast response capacitive sensors with screw-off protective cover. 5 minutes. /Maximum, data hold and low battery indication functions. Features: 1. Backlit dual display for humidity and temperature. 2. Measure dew point and wet bulb temperature. 3. 99 record storage capacity, ergonomic design, with protective leather case. 4. Fast response capacitive sensor with screw-off protective cover. 5. minute. / Max, data hold and low battery indicator functions. 6． With automatic shutdown function. 7. It can display three temperatures, ambient temperature, dew point temperature, and wet bulb temperature. Specifications: Condition: Model: PM6508 Ambient Temperature Range: -20-60C (-4 to 140F) Accuracy: 1.0C (0 to 45C) 1.5C (-20 to 0C, 45 to 60C) Resolution: 0.1C/F Update Rate: 400ms RH Range: 0-RH Accuracy: 3.0% RH (20% to 80%) 4.0% relative humidity (0% to 20%, 80% to) Resolution: 0.1% Wet bulb temperature range: -20 to 60C (-4 to 140F) Accuracy: 1C (0 to 45C) 1.5C (-20 to 0C, 45 to 60C) Resolution: 0.1C/FD Dew point temperature range: -50 to 60C (-58 to 140F) Accuracy: 1C (0 to 45C) 1.5C (-50 to 0C, 45 to 60C) Resolution: 0.1C/F Update rate: 400ms Storage quantity: 99 Power supply: 4* AAA dry cells, 24A, LR03 (not Included) Battery Life: 200 hours Weight: Approx. 261g/9.2oz Size: approx. 184*60*29mm/7.2*2.4*1.1 inches Packing list: 1*PM6508 digital humidity and thermometer 1*bag