Humidity/Temperature Pen (445580)

Take this this handy humidity and temperature 
gauge on the go and rely on a long-lasting 3V 
lithium battery for maximum usage time.
The slim Extech 445580 humidity/temperature 
pen will capture humidity readings from 
10 to 90% RH and register temperatures from 
-10°C to 50°C (14°F to 122°F). 
This utility tool is ideal for field work, 
storing maximum and minimum readings until 
the memory is cleared and includes a data-hold
button for rapidly fluctuating measurements. 
For more details please refer datasheet.