WBGT Heat Index Monitor, RH Range 5-95Pct, Temp Range 32-122 Degrees F (0-50C), Wet Bulb Temp Range 70-115 Degrees F (21-45C), Dew Point Range -85 to 115 Degrees F (-65 to 46C), Wet Bulb Globe Temp Range 32-122 Degrees F (0-50C), Black Glove Temp Range 32-176 Degrees F (0-80C), Humidity Accuracy +/-3 Pct of Reading From 10-90Pct RH, +/-5 Pct of Reading Elsewhere, Temp Accuracy +/-0.8 Degrees F (+/-0.6C), Display LCD, Battery Type (2) AAA, Interface RS-232, Includes Batteries, Users Manual