An electrosurgical apparatus comprising an electrosurgical generator coupled to an electrical power supply configured to generate electrosurgical energy； a handpiece including a housing having a passage extending therethough, the housing having a proximal end and a distal end, the distal end configured to support an electrode, at least four switches disposed on a surface of the housing configured to be selectively activated by a user, and three wires connected between the housing and a connector, the connector configured to be operatively coupled to the electrosurgical generator, a first wire being coupled to the electrode and configured to receive electrosurgical energy from the electrosurgical generator, a second wire being coupled to a first switch of the at least four switches and configured to generate a first activation signal and a third wire being coupled to a second switch of the at least four switches and configured to generate a second activation signal, wherein a third and fourth switch of the at least four switches are coupled to the first wire and the second or third wire via a respective resonant circuit configured to generate third and forth activation signals； and at least one activation sense circuit configured to distinguish between the first, second, third and fourth activation signals and to execute a corresponding action.
