A brake device includes a brake disk fixed to a power transmission shaft, and a brake caliper for braking the brake disk by a nipping action. When an exception is generated, it will be associated with attributes corresponding to those business objects and business areas to which the exception relates. Each of the noncontact transmitting units includes a power coil and a signal coil. Enqueuing credits are determined based on the information extracted from the invoices, and are divided into a plurality of values according to the decimal number system. The new frame structure incorporates features that allow the handset to leverage the advantages of multiple frequency channels, especially in the event of interference.