There are two compartments on either side. The round ones on the right are for an extra jar and the doser while the rectangles on the left are for the power cord and a stack of business card sized sample cards. The case also has a pair of handles (one for carrying the case, one that retracts for rolling) and wheels. Pretty sure it's small enough to count as an airplane carry on bag since a lot of people who own these just bring it along on coffee buying trips.