ENS-02. First modification.
Casing: painted plastic, faceplate — sandblasted aluminium (the same idea is now implemented in products of Apple Inc.).
Multistep control of the action energy with “up” and “down” buttons.
Indication: one LED displaying action energy level.
Frequency was set with binary code (1, 2, 4, 8). “Depth” change switch.
Electrode was cylindrical, coaxial, detachable. The device had socket enabling connection of remote electrode.
Power supply: built-in accumulators.