These are "Hold-to-run" controls with Braille indicator for the blind. While in motion, the controls are interlocked for a pre-set time, with precedence given to the cabin's controls, so that there is no interference over movement should more people summon the cabin to the floor at the same time. The push-button panel on board has an alarm button connected with an acoustic alarm and an emergency button which activates the anti-power-cut device which in turn allows descent to the closest lower floor in the event of an interruption of the electricity supply.
