The mark identified with the door chimes, also known by the ding-dong. It was equally innovative on these bells but no wires. In both cases it continues to lead the European market. The range of products has grown to industrial buzzers, horns, door knobs, transformers, wireless and wired motion detectors, alarms and mini-alarms. Now integrated into a division of the Honeywell engineering group, the products in its catalog have extended to new areas, such as wireless equipment, batteries, thermostats and components for central heating.