I recently received a 'grab bag' of stuff from a friend that's moving
out of state and didn't want to bother packing it. It contained two
automotive diagnostic tools that I'd appreciate more information on.

1. A Mac Tools ET120. It looks to be a powered circuit tester with
different colored led's that turn on depending on whether you're
probing a ground or a positive voltage. Am I on the right track?

2. A 8.25 x 5.5 x 1.5 inch box. Black in color labeled KAL SCOPE KAL
Equip. Made by Tektronix - the test equipment company. It appears to be
a highly accurate digital VOM combined with a two channel
oscilloscope.A 4.5 x 2.25 inch LCD screen provides the readout. It came
without any test leads but with two batteries and charger.I've charged
the two batteries that came with it and it works perfectly. It appears
that there are several different modules/adapters that are available
for it for different automotive diagnostic tests. Again, am I on the
right track?

I tried to find out about both items via a Google search and haven't
been able to locate any manuals for either one.

I appreciate any help that you all can send my way. ]

Thanks all.

Charlie