Here's a video of the shower "In Action". I thought this would be the most useful way of describing the problems with this product. I know it's cheap but it's also pretty much unusable in my opinion. You can fiddle with the tap a bit to adjust the flow but this was the maximum flow rate.
This doorbell makes a very audible "ding-dong". There are no other sound options and no volume control. I've bought 2 and both times fitted with more attractive pushers. It comes with a surprisingly long length of bell wire give the low price.