TENS or Chiropratic unit ?

What difference there is between a TENS and a chiropratic unit? I've seen an unit that can act as a tens and chiropratic unit it cost about 140 dollar but I don't understand the difference.

I never heard of a chiropractic unit for estim, but your best sexual sensations are going to be with an estim unit designed to do what you want. The good ones range from 150 to 500 USD plus the cost of electrodes which can sell for a few dollars for adhesive cardiac and TENS electrode pads to $150 or sometimes more for elaborate vaginal and rectal plug type electrodes.

Paradise, Folsom, Hotboxx and Sextek are the best ones.

If you want to use estim (electro-sex), I highly recommend trying & buying an ET-312 ($500 new), which is the only fully digital unit designed for sexual usage. It can generate electronic signals that are very erotic feeling and quite sexually stimulating. Most people easily have an orgasm with one. The digital aspect gives it unmatched flexibility. It is universally acknowledged globally to be the very best unit available for sexual pleasure.

If you're not sure of what you want, or if you'd really like it, I always suggest finding someone who will let you try it. I demonstrate electro-sex on women at parties in New York City. They almost always say things like OMG when I turn it on, and cum easily -- often multiple times. It feels REALLY REALLY good.

In my experience, you don't need a lot of channels. Most people cum with one channel of something that feels really good. With more channels, I find the cross stimulation more confusing than erotic.