i dont know what it is like in a 4th gen, but in my 3rd gen, the light wont come on until heavy heavy slippage and the beeping wont even start until i am already in a bad situation, so if you want to hear it beep, get it stuck, and i promise that will bring all the beeping you could ever want out of it, these yota's like to beep at you when you are in a sticky situation!!