The EPLAB BB2.1 Cup is a compact PC button box measuring 168 × 88 × 64 mm. It provides ten white-backlit push buttons and one rotary encoder for brake-balance adjustment. The ABS housing has a carbon-look hydrographic finish, while the knobs are anodised aluminium with laser-engraved markings. USB connection is plug and play, with no additional software required for the controls. The included bracket rotates through 180 degrees and sets the unit at a 10-degree angle. A 1.5 m USB cable and mounting hardware are included.