Ordered a PODOFO 7" touchscreen car stereo from amazon, first one I received the touch screen did not work at all. Received a replacement and installed it. Neither one has any identification, model number, serial number, to identify it. Instruction manual is practically non existent, no installation manual, no help at all. Radio works ok, but just ok as I need a antenna booster because the radio just doesn't pull any stations in other than strong local stations. I used Bluetooth to hook up my phSee full review