6.2 double din car dvd player gps navi in dash stereo radio android 9.0 usb 4g hands free yes a2dp (bluetooth stereo music) yes, can play stereo music through bluetooth bluetooth music control yes, play/pause/previous/next pb-download yes, can download phonebook from mobile to this unit pb-search yes, can use the first letter to search contact member in pb-listings calling records yes, dialed call, received call, missed call setup auto answer, auto connect, device name built-in microphone yes, on the front panel external microphone jack yes, on the back.