inputs.text: many firmware issues quality glitches - radio good potential current firmware level barely usablemanual programming similar baofengs offset ignored one store tx rx frequencies channel end done even assigning channel names manually cumbersomecomputer programming done using serial usb serial ehemulation 35mm stereo pin cable programming sw not accept copy paste radio not chirp compatible date review run windows xp need worry normal prolific driver limitations run win 7 need fix mscomctlocx driver sw work windows 7the main issues radio listed below1 humming noise volume way even using signal clean battery power source2 loss audio encoder used switch fromto active channel3 loud beep sounds scan function finds active channel instead playing audio4 rx interference suffers vehicle motion radio fed cigarette lighter cord came it5 high cost return china around us50 even unit defective not amazon dealer seehem willing pick tabtherefore 99 radio would need spend 50 value return situation basically forces keep radio use limitations described paper weighti seehem owners stating not hear humming noise described part hit miss quality unit main issues firmware dependent radio no capability firmware upgraded way see fix wait 2 3 new firmware cycles purchase thattime mileage may vary disappointed