inputs.text: soundstorm s133c3 133 allinone flipdown tft monitor dvd player - nice picture attractive unit however sound via ir headphones fm modulation much low rendering modes listening useless unless plan listen running rca earphone connection vehicles stereo systehem not satisfied sound level measure validation try two different brands ir headphones unit yielding similar results ir transmitter fm modulation volumes typical levels road engine noise renders unit useless audio outputs choice impressed picture quality picture without audible sound simply not work