inputs.text: blueant interphone knockoffway different looks exact - experimented many bluetooth helmet systems trying find best one ham radio motorcycle system saw unit 55 bucks whatever looked like blueant interphone pricei figured knockoff no idea different going beby waythere good happy ending story already owned real blueant interphone modify mic elementtoo much wind noisebut got work well open box see \\interphone\\ \\user manual\\it almost exactly like real one bit shorter length noticed main unit no volume buttons pair two interphones togetheryou use volume buttons went idea using knockoff intercomm passenger one button one button one function one function onlypair cell listen music via cell output fake looking blueantthen read instructions found would uselessjust like unit purchased company least werent 2 different product photos different features add like last one business input cord thats used charging mic headphone charge unit unplug micheadphone[ single speaker ] plug wall wart waitsomethings wrong herethey sent 220v plugargh keep short dont expect intercommdont expect pair devices well 160ma batterydont expect get 4 hours talk time listed book[ real one 350ma ] playing music cell headset expect maybe hour 2 ends switched helmets reinstalled real blueant interphonei must broken wire accidentally blew attached micearpiece figured heckill try knockoff one see pinouts boy theyand speaker much louder better soundingmost important allthe mic came fake job sounded much better real original interphone onethank god thing lying aroundit really made one systems work rather greatgo figurefor try cheap doesnt bite nowafter experimenting bluetooth helmet systems thereincluding ones built helmet[ stay away ] use chatterbox xbi connect everythingat heand real blueant side helmet yes wear 2 lastlythe ac wall unit sent box looked like fit kithowever output shows 220v 110vat 500mathats half amp charge 160ma battery hope cuts half using 110v cuz wired directly ac wall plug[ im electronic experienceddont yourselfit could fatal book says blue light blink charging plugged blue light steadily lit let sit 3 hours[ book says 4 hours think totaldischarged battery ] sudden blinking get backwardsif buy oneand money using cellphone think worth ityou going laugh pretty hard try read manualchinese english must hard hepj