inputs.text: hit miss try different brands - either works not ipod mp3 connection filmsy cannot connect correctly tried enclosed cable several others not connect properly resulting sound tinny no sound tried several different brands transmitters not found one works no matter price wish could find one works thoughts tried three different brands transmitters one barely audible terrible sound one defective mp3 plug jack terrible sound required high volume radio adjustments bass fader hear poor sound sd card unit mp3 jack usb slot sd slot update finally iriver aft 100 purchased works probably not conclusion poor quality control devises general truly hit miss