Pushbutton sensor 3 Basis, 1-gang for KNX System 55, with start-up rocker Features: Mounting on bus coupler 3. Disassembly safeguard by screw connection. Rocker function: Switching, dimming, blind, value transmitter 1-byte, and scene auxiliary unit. White operating LED. Two red status LEDs per operating surface. Inscription space illumination for rocker sets with inscription space. Function of inscription space illumination and status LED can be configured. Notes : Professional labelling with the Gira Inscription Service www.marking.gira.com. The pushbutton sensor is supplied with a program-neutral start-up rocker. The suitable rocker set for the design line must be ordered separately.