inputs.text: buyer beware - caveat ehemptorpurchased directly mobile black boxdoa unit never worked no signal transmitted happen technical backgroundafter 45 minutes efforts get operate lcd display went blank battery door not locking place product feels inherently fragile contrary promising description testimonials sellers web pagepurchases returns within 90day \\warranty\\ period always shipping costs buyer expense regardless fault restocking fees strictly sellers discretion may easily reach 40 level per websitemerchant operating po box california communicating strictly via unsigned emailsparent companys name address well mobile black box address telephone number names \\mobile black box\\ \\mobileblackbox\\ not listed web page could not found major telephone directories better business bureau listings researched investigation indicates could based outside californiaseller uncooperative issuing full refund filed claim via payment clearing company unsuccessful attehempt resolve issue amicably ruled favor buyer us eventually able recover full amount