A weighing compartment having a work surface, including a balance which is integrated into the weighing compartment and which has a scale pan arranged on the work surface, and at least one operation surface which is arranged within the area of the work surface. The display panel includes a first pixel group and a second pixel group arranged in the first row and adjacent to each other. The apparatus includes a communication unit for sending and receiving a data packet through the air, and a control unit that outputs a control signal for controlling the transmission power according to connection information of the data packet received through the communication unit. Based on the first kind of data of the reference users, the trait of the target user is determined.