Title: Depends on what unit you get.
Review: Length:: 0:54 MinsIf you get a unit that has the rectangular unit, you're good to go. It works.However, if you get the one that is shaped like a paw, it is underpowered and does NOT work.I'm glad I found my old control unit!!!The video is unedited, so it is kinda long with not much going on other than my dog standing on the mat.Notice the green light is on and it should be working.I tried it as well, and I could kinda feel a little pulse, but it wasn't much. Definitely not enough to deter me.With the rectangular unit, you feel it, kinda like licking a 9 volt.
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