Abstract: The present invention relates to a therapeutic device for the non-invasive treatment of human or animal bodies. Particularly, though not exclusively, the invention relates to a therapeutic device that selectively emits and maintains an energy field (electrostatic field, pulsed electromagnetic field or ultrasonic field) within a preselected frequency range for the effective alleviation of pain, inflammation and/or an alternative treatment. The device comprises an electronic circuit including a frequency generator for selectively producing electrical signals. The electronic circuit comprises a toroidal coil that is adapted to produce an oscillating electromagnetic field within a preselected frequency range in response to energisation by said electrical signals. The electronic circuit is constructed and arranged to adjust the electrical signals produced such that the coil selectively maintains the pulsed electromagnetic field within the preselected frequency range. The coil may be detachable.