Batteries not included!

One of the most annoying things to read.
Have bought this bell for a friend. She has had several of the 'wireless' type and all seem to fail. Thought I would take her back to basics as she keeps missing callers.
I had intended to blip the 'Big Top' which has appeared in the local park for an American circus, but the rain came down and I had to return home quickly as I wasn't prepared! (or had been too optimistic)