I found this USB inspection camera. It must be attached to a computer via
USB, as is has no internal battery. I like it because you can save the
images, unlike the ones with monitors only. Cost less than $80. 12mm dia
head, but they make one with 9mm. Comes with mirror, magnet and hook. Trying
to find an android usb camera app, so I can run it off my tablet, if anyone
knows of one.
C. Smith



There is even a wireless one ... bluetooth or something!

http://www.generaltools.com/DCS100--THE-SEEKER-100-WIRELESS-USB-VIDEO-INSPECTION-SYSTEM_p_1297.html

SD


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