Jumper device for answering mobile calls using car speakers jumperjack phone dev

doc969

Distinguished
Oct 31, 2009
1
0
18,510
whats the website for that Device called a jumper jack for answering mobile calls via car speakers, and does it work?
 

Roy81

Distinguished
Jan 3, 2010
1
0
18,510
have a help web site for jumperjack. Its www.JumperJackHelp.com. My jumperjack just increases the the music volume on 99.3 fm when I use the radio volume control like they tell you do to increase the caller volume.That web site doesn't help solve my problem. so the jumperjack is worthless to me.