There was also a battery powered version available and I had one for the road for doing repair and service in remote areas. Leader was the "leader" in those days for these little scopes.
I still have one, brand new in original packaging, never used, never turned on and I will probably keep it forever.
Yours also looks like new, especially the case.
What to watch out for?
- Do not exceed input voltage, the front end is very sensitive to break. (Leader fixed one for me under warranty)
- Do not turn the brightness too high, it will burn in. Actually keep the brightness to the lowest level.
- And as I said before, if you have dust in your area, open up the scope once in a while and clean it out
- Chain it to your bench, people like it so much when they see it (soooo cute), they want to take it.
Enjoy your new scope.
The more you use it, the more you will love it!