Well I searched around and could find anything about this so I decided I would ask. I bought a little BT unit to put in my 04 tl so i could have BT and other options (aux-usb,ect) but once installed my radio seems to lag every time i press a button i have to push it a random amount of time. the only thing that responses it the volume but the screen doesnt switch it and simply lags. Any help

Its a Lapower from ebay.

Thanks in advance