It's been a couple of year now, but I spent $250, or $350, ( It's been so, long I forgot now) on a pair of "80 video glasses. I used them once, or twice, then they just stopped working. So, after I E-mailed Edward, (technical support person-and I think owner of Zetronix) which in it's self took a long time correspond. I decided to send them back...8 MONTHS AGO, BACK IN APRIL, 2010. And, anytime I finally get ANY answer, it is..."They're at the factory being fixed. AND, DON'T TRY TO CALL THEIR "CUSTOMER... read full review »