1.No need installation. 2.Android sytems,support WIFI (optional) 3.HD ... slot *Support MP3,MP4,AVI,WMA,DIVA,MPEG.RMVB,etc A/V playing.*Suport IR transmission,use wireless headfhone listen music ... transmitter (optional)*Android Systems (optional) CAR DVD PLAYR HEADREST PORTABLE/NO NEED INSTALLATION/9 INCH/HD/USB/SD/FM/AVI/WMA ...