It contains a large, manually played concert carillon, comprising 68 bells weighing a total of 48 tonnes (106,000 lb) connected to a keyboard spanning 5 and a half fully chromatic octaves; the largest bell weighs 7.8 tonnes (17,000 lb).
The carillon was given to the city by Daimler-Benz AG under CEO Edzard Reuter in 1987 on the occasion of Berlin's 750th birthday.
Berlin carillonneur Jeffrey Bossin plays concerts on the carillon every Sunday at 3:00 p.m. from the beginning of May until the end of September and on the more important national holidays (2:00 p.m. in December); the programs include music written for the carillon and arrangements of classical works and popular songs.
Tours of the carillon tower, including a unique view of Berlin and its government buildings, are offered at the end of the concerts.
The carillonneur guides groups through the tower and (in English and German) answers questions, explains the special features of the instrument, and recounts the history of the carillon in Berlin from its beginnings under the first king of Prussia to the reunification of Germany.