GFTH 200 Digital Hygro-/Thermometer Measuring range (temperature): -25.0...+70.0 °C Measuring range (humidity): 0.0...100.0 %RH. Resolution: 0.1 %RH. Resp. 0.1 °C / 0.1 °F Features: min./max. value memory, hold function, socket for external temperature probe