Easy-set calibration Thermo-hygrometer of easy-carry card style              L89.5mm x W58mm x Th7.8mm
ON/ OFF and C/F buttons
SIDE  slide switch to INCREASE or DECREASE  the humidity                   Humidity accuracy +/- 2% from 20% to 90%
Temperature accuracy +/- 1 degree (displayed in Celsius or Fahrenheit)
Storage Conditions: -20 to 60oC
Weight: 35g
10 Second refresh rate                                                                             Button cell battery included 
with strong magnet bottom