Vtg YSI Portable Dew Point Meter Hygrometer Power model 91 temperature

Description

Vtg YSI Portable Dew Point Meter Hygrometer Power model 91 temperature.
Bought in an electronics bundle at an estate sale guy was a collector a lot of the electronics in the have worked and were still wrapped in bubble wrap in their original shipping boxes does come on do not know if it works to it’s full capacity so might just be for parts it’s a chance