Picked it up at estate auction.  Bought to resell.  I played with it for a few minutes.  Everything seems to work fine.  I know absolutely nothing about these things.  So, I'm selling it as is, and powers on.  AI Description below:  

Pre-owned. Powers on and displays readings. Impeller spins freely. Battery compartment is clean. Moderate cosmetic wear from normal use. No case, manual, or accessories included.  

Extech 45158 Mini Thermo-Anemometer with humidity measurement capability.

Features include:

• Air velocity measurement
• Relative humidity measurement
• Temperature measurement
• Hold function
• Multiple unit selections
• Compact fold-out design

Unit has been tested for power-on and display operation. Impeller spins freely.

Please review all photos carefully for condition and what is included.