This has been my husband's personal item, He used it in engineering school and work.  It's still working, you will need 2 cr2032 batteries to make it work. Serial Number E7005287.  It measures approx 5 3/8" x 2.75".  

Smoke free home

Please see photos for more details as they are considered part of the description.

Please check other posts, as I am slowly selling everything.

I will combine shipping when you purchase multiple items at the same time.   

Please ask questions before bidding.  I post feedback after you have received and or posted feedback.  Thank you for looking.