Wrist Bands w/Pulse?

I've heard that they make wrist bands that deliver a pulse sensation. They are supposedly more effective than the regular wrist bands. They are also way more expensive. Anybody have experience with these or know if they are more helpful? I'm incredibly prone to seasickness and want to do everything I can to prevent it.

[oysterlover]

It is called Reliefband.
and i checked it myself after I got sick like a dog. works the same as Travelband and sea band, except it has a battery and is expensive....and, it can not be used with any kind of implanted electronis devices.
for me the wristbands work very well and , i was really sick before.