Good bell but the instructions are rubbish for changing the bell tone(had to go onto the internet for proper instructions from other who had worked it out) and it looks like you would need an extension lead to bring the bell to the push to change to another tone in future. Not sure how robust the bell push will be with regards to water penetration, as there is no rubber around the push - only time will tell.
This is a great monitor and very easy to set up with a crisp and clear screen. I have only a couple of things against it an d that is the on off switch - you have to keep it pressed for more than a second or so to switch on and off. The second is the shiny surround which reflects too much. The apps along the bottom of the screen look as if they have a black line through them, but it the small reflection that makes it look like that. I would still recommend it.