The present invention provides one or more powered wireless transponders andor one or more passive wireless transponder devices communicating with a readerinterrogator and the method of efficiently inventorying these devices without the risk of eavesdropping. The cavity substrate includes a first opening that penetrates the cavity substrate and serves to house the driver IC, and an insulation film formed on a wall face of the first opening. The housing has first and second sections. A sensor is operatively coupled to the kayak to determine a relative speed thereof. The ultrasonic treatment appliance further comprises a distal probe part formed as an integral part of or independently of the probe at the distal end of the probe, and a clamping portion opposed to the distal probe part so that the clamping portion can open or close freely, the clamping portion being freely attachable thereto or detachable therefrom.