A device for measuring a surface comprises a light source, a light directing device, a detector arrangement and an evaluation circuit. The offer defines a benefit to be provided in exchange for the player’s commitment to an obligation defined by the offer. The solutes are incompatible with each other. The method also includes receiving a telecentric light signal on a display surface. The sheet-like battery is rolled up to be a pole shape and located between cutout parts of the imaging board, the transmission board, and the control board and the inner wall of the capsule casing.