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Theres is a negative current mode, a positive current mode and an alternate positive AND negative mode at the same time. In this demonstration, you only show the first two modes. What is the third one used for and how do we use it.
PS: don’t you need to put a gel on your face to make it work without getting shocks?
There is contradictory information. The video states “never move the device downwards” but she does several times. Please clarify