TFA - Dostmann KlimaLogg Pro Professional Thermo-Hygrometer With Data Logger Range: Temperatur : 0...+50°C / +32...+122°F, H: 1...99% --- Product features : for the control of temperature (precision ± 1°C) and humidity (precision ±3% from 35...75%), extendable with up to 8 transmitters, indication of dew point, max.-min.-function with time and date of recording, alarm at freely adjustable temperature and humidity values (upper/lower limit), alarm event function, data logger with up to 50,000 measured values, recallable via display or PC USB interface, switching output, radio-controlled clock with seconds, date, time zone ±12 hrs. Range: T: 0...+50°C (+32...+122°F), H: 1...99% optional Transmitter (not included): Temperature and Humidity - Kat.Nr. 30.3180.IT Range: T: -40...+60°C (-40...+140°F), H: 1...99% Temperature with ca. 2 meter cable - Kat.Nr. 30.3181.IT Range: T: -40...+60°C (-40...+140°F) Accessory: USB-Transceiver, PC-Software free to download Main unit: wall mounting or table standing, 98 x 25 (77) x 137 mm, 147 g, 3x 1,5V AA batteries included,