This Braun calculator is the reissue of the Braun ET66 calculator, one of Braun's most iconic designs, which was collaboratively designed by Dietrich Lubs and Dieter Rams and originally released in 1987. The Braun ET66 calculator is considered to be the pinnacle of the “less but better” philosophy thanks to its simple, rectangular design with convex, circular buttons. This calculator measures 82mm x 139mm x 16mm and includes a protective slide cover. Battery included.