Just does the reversing beep, but with the buzzer muffled it is quite difficult to hear - lower pitch and quieter. All you need to do is find out which wire is only live when the door is open with key in and disconnect it too. Test everything is OK then put it all back. It was quiet enough for me not to bother with the other things that make it beep. As for the beeping bothering me - yes a little, but I knew others didnt quite like it and I was bored so...