An apparatus for treatment by therapy of a human or animal body comprises a treatment unit 1 including a casing 20, a battery and means for generating and delivering microcurrent pulses, a carrier adapted to be attached to the human or animal body, including a pair of electrodes (3, 4, Figure 1) to contact the body at spaced locations, and means for connecting the electrodes to the treatment unit to receive the microcurrent pulses. The treatment unit 1 has a single port 23, acting as an input for charging the battery and as an output for the electrode connection means for delivery of the pulses depending on which is connected via the port 23. A voltage dependent circuit may detect what is connected, and activate a charging circuit or a pulse delivery circuit accordingly. The device may be programmed with a range of pulse patterns, which may be selected by buttons 26, 27.
