Manufacturer: Extech USA
Model:  AN25
Built-in multiparameter sensors measure Air Velocity, Heat Index,
Wet Bulb Globe Temperature (WGBT), Humidity, Ambient Temperature,
Dew Point, Wet Bulb, Temperature, and Windchill
+ Air Velocity
 - ft/min 80 to 4920ft/min 0.1ft/min, 1ft/min (>1000ft/min) ±3% FS
 - m/s: 0.4 to 25m/s 0.1m/s ±3% FS
 - km/h: 1.4 to 90.0km/h 0.1km/h ±3% FS
 - mph: 0.9 to 55.9mph 0.1mph ±3% FS
 - knots: 0.8 to 48.6 knots 0.1 knots ±3% FS
+ Temperature/Windchill: 5 to 122°F (-15 to 50°C) 0.1°F/C ±2°F/1°C
+ Relative Humidity: 5.0 to 95.0%RH 0.1%RH ±3%
+ Wet Bulb: 5 to 122°F (-15 to 50°C) 0.1°F/°C
+ Dew Point: -103 to 122°F (-75 to 50°C) 0.1°F/°C
+ Heat Index: -31 to 401°F (-35 to 205°C) 0.1°F/°C
+ WBGT: -20.2 to 130°F (-29 to 54.5°C) 0.1°F/°C
+ Dimensions / Weight 6x1.6x0.7" (152x40x18mm) / 2.1oz (60g)

Complete with CR2032 battery
Warranty: 12 month