Design: Universally applicable hand-held box of medium size. Large area for cutouts and openings. Recessed control area for keyboards. Lid of battery compartment in the base (battery compartment as accessory). Sealing for IP 65 as accessory.
Version IV: top with display cutout for standard-LCD modules with 4 lines x 16 characters.
Supply: case-top and base, battery compartment lid, assembly kit.