[E³] Engstler Elektronik Entwicklung GmbH was founded in 2001 to design, develop and manufacture state-of-the art RGB-backlit LCD push-button switches with Multi-Segment Color and control panels. As the pioneers of the LCD key technology we are building on over 40 years of experience in the development of custom input systems. Our engineering department provides product support, development assistance as well as design and production services for our custom panel customers in demanding 24/7 applications and operating environments.