Features:1. Backlight dual display of humidity and temperature.2. Measures dew point and wet bulb temperatures.3. 99 record storage capacity, ergonomic design with protective holster.4. Quick response capacitance sensor with twist-open protective cover.5. Min. / Max, data hold and low battery indicator function.6. It has automatic shutdown function.7. It can display three type of temperature, ambient temperature dew-point temperature wet bulb temperature.Specification:Condition: 100% Brand NewModel: PM6508Ambient Temperature Range: -20-60°C (-4 to 140°F)Precision: ±1.0°C (0 to 45°C) ±1.5°C(-20 to 0°C,45 to 60°C)Resolution: 0.1°C/°FUpdate Rate: 400msRH Range: 0-100%RHAccuracy : ±3.0% RH(20% to 80%) ±4.0% RH(0% to 20%,80% to 100%)Resolution: 0.1%Wet Bulb Temperature Range: -20 to 60°C (-4 to 140°F)Precision : ±1°C (0 to 45°C) ±1.5°C(-20 to 0°C,45 to 60°C) Resolution: 0.1°C/°F Dew-point Temperature Range: -50 to 60°C (-58 to 140°F) precision : ±1°C (0 to 45°C) ±1.5°C(-50 to 0°C,45 to 60°C)Resolution: 0.1°C/°FUpdate Rate: 400msNumber of Storage: 99Power Supply: 4 * AAA dry Batteries, 24A, LR03 (not included)Battery life: 200 hoursWeight: Approx. 261g / 9.2ozSize: Approx. 184 * 60 * 29mm / 7.2 * 2.4 * 1.1inPackage List:1 * PM6508 Digital Humidity and Temperature Meter1 * Bag.