The carillon in Mjøsa consists of 24 bells, ranging over two octaves. They are different in size and weigh from 29 to 680 kilograms with a total of 3.8 tonnes.
The carillon was drawn by the architect Tor Kraft from Hamar. The bells are programmed to mark every hour from 09:00 to 21:00. First played a timing signal composed by Bjørn Sverre Kristensen, then the chimes followed by a melody. Every third hour, a longer melody. These vary with the seasons.
The bells can also be played on manually via a keyboard, and it is possible to play concerts. The carillon and its location has become a landmark and is unique to Hamar.