Man, even the 2B runs on battery huh? The vast majority of the Estim devices seem to do that, which I find a big drawback. It becomes a constant source of spending money and wasting materials that way.
If batteries are an issue, why not just use rechargeable batteries? A charger and a pack of rechargeable batteries is pretty cheap compared to what they used to cost. And as SomeoneRandom stated, the e-stim units use very little power, I think I’ve replaced the batteries in mine one or two times in the few years I’ve had them.
This has been a pretty interesting thread, because I was completely unaware of the high-end e-stim units. Every time I’ve tried to do research on it I’ve found the medically focused variety, not the sexual one. I don’t know about spending $400+ for these devices though, I just don’t see why they cost so much (I have a feeling the app development tacks on a pretty penny). I’ve never even heard of synchronizing with MP3s, that just blew my mind and makes me even more curious…
Personally, I’ve started with the cheap Chinese $20 units on ebay and I’ve had good mileage out of them. The feel is different based on what sort of contact end points you use. I’ve used cloth bands with metal wire inserts, rubber/silicone bands, sounding rods both metal and silicone, and clamps.
When I use the e-stim device standalone, I usually focus on foreskin stimulation. Mainly using the aforementioned clamps (plastic clamp with wire leading to a small metal disk). I’ve had a HFO from that alone. When I use e-stim with an onahole, I either chuck the two bare contact points in there and use onahole as normal (the leads usually stay at the end of the onahole, so you get a shock every time you hit the back of the toy) or I use a modified onahole in which I made a hole in the very back and inserted a sounding rod (you can adjust how much penetration into the urethra you want and then seal with glue or rubber bands on both ends of the hole) which is connected to the estim unit (with the other lead usually on a band around my shaft). Anyway, reason I’m pointing this out is that with a little creativity you can make even the cheap and shitty e-stim units work wonders.
As much as people seem to hate the Coyote, it’s the only one I would remotely consider buying because of cost. The Chinese ones haven’t killed me, so how much worse could this be? (famous last words)