Item #F305 HYGROHAWK SPECS Model F305 Dimensions (LxWxD) 6.9 x 1.9 x 1.2 in (175 x 48 x 30 mm) Gross Weight 4 oz (100 g) Display LCD Batteries (included) 2 AA batteries Measurement range    Hygrostick 30-100% RH, ±2%RH at 68°-86°F (20°-30°C) 32°-122°F (0-50°C) ±0.3 °C    Humistick 0-10% RH, ±3%RH 10-90% RH, ±2%RH -- at 68°-86°F 90-100% RH, ±3%RH 32°-122°F (0-50°C) ±3°C The complete HygroHawk includes: Humistick sensor Software CD & data cable Instructions 2 AA batteries Carry pouch with belt loop Optional: Humistick extension lead Surface temperature sensor Additional humisticks & hygrosticks   HygroHawk Digital Thermo-Hygrometer Reduce the time it takes to gather critical, precise drying data. With a quick acclimation time and an expanded measurement range, the HygroHawk thermo-hygrometer ensures maximum efficiency and accuracy on the job. While many other hygrometers were originally designed for other industries, Dri-Eaz optimized the HygroHawk specifically for water damage restoration. The HygroHawk incorporates a range of features requested by Dri-Eaz University students and other top restorers, including: Fast readings Expanded, full range (0 to 100% RH, 32 to 130°F) Replaceable sensor — calibrate without sending in the whole unit Continuous logging Dual display showing GPP, RH, or dew point along with temperature  Virtual Training Center - GE Protimeter HygroHawk