Pen shape, thermohygrometer is featured with a rotary probe enabling fast readings. Water resistant sturdy plastic housing with 138 mm length offers long life cycle. Featured with a clips for safe and practical use. Offers dual display for humidity and temperature on a large and clear 52 x 13 mm LCD display. Featured with maximum & minimum reading memory. Humidity measurement range is 20% RH – 95 %RH with +/- 3%RH accuracy. Temperature measurement range is 32 – 122°F (+/- 2°F) or 0 – 50°C (+/- 1°C) selectively. °F & °C values are exchangeable by a simple switch control at the back.