No you can’t make the beep louder, or the vibration stronger. You can only adjust the level of the static correction. But you can press the beep button down which will produce a continuous beep. Same with the vibrate function, hold it down and it will vibrate continuously until you release the button.
But, if you hold down the shock button it will only emit a static correction once. If you want to emit another shock, press it again. You do not have to worry that it will keep shocking your dog continuously.