Hanna Instruments HI 93510 Waterproof Thermistor Thermometer

Description

Hanna Instruments HI 93510 Waterproof Thermistor Thermometer
I got it from estates
Put battery on it and tested
Push on/off button few second it show Er as you can see in the pictures. I don't know how to clear that or do something
When pushed it show like picture number 1
After few second it show like picture number 2
That is all I know
I would like sell for part or not working item
Remember not sell for working item
Please take into consideration this item is being sold for parts/repair AS-IS final sale.
Thanks for looking!
Good luck!
Fast shipping