A head mounted device comprising: at least a pair of electrodes, configured, when the head mounted device is donned, to engage the scalp of the user, said device being further configured to deliver via said electrodes to the scalp of the user a balanced pulse comprising a positive phase train including a streak of constant current positive phases separated by rest times, said positive phase train immediately followed by a negative phase train including a streak of constant current negative phases separated by rest times, each of said positive phases and said negative phases intended to provide a predetermined amount of charge to the head of the user, wherein each of a first time ratio, between a cumulative duration of said rest times between said positive phases in said positive phase train and a cumulative duration of said positive phases, and a second time ratio, between a cumulative duration of said rest times between said negative phases in said negative phase train and a cumulative duration of said negative phases is smaller than a predetermined threshold ratio; at least one sensor adapted, when said head mounted device is donned by said user and during transmission of said pulse, to engage the skin of the scalp and to monitor an amount of charge delivered by said positive phases and said negative phases; an electronic circuit, functionally associated with said at least two electrodes and having a compliance voltage; and a processing unit, functionally associated with said electrodes to provide instructions thereto and with said at least one sensor to receive input therefrom, said processing unit programmed to: (a) receive input from said at least one sensor; (b) identify in said received input a reduction of charge delivered by one or more of said positive and said negative phases; (c) upon identification of a said reduction, to provide input to said electrodes causing adaptation of at least one said rest time in at least one of said positive phase train and said negative phase train; and (d) repeat steps (a)-(c) until: said predetermined amount of charge has been provided by each of said positive and said negative phases; or at least one of said first time ratio and said second time ratio reaches said predetermined threshold ratio and a voltage of said balanced pulse reaches a predetermined voltage threshold. at least a pair of electrodes, configured, when the head mounted device is donned, to engage the scalp of the user, said device being further configured to deliver via said electrodes to the scalp of the user a balanced pulse comprising a positive phase train including a streak of constant current positive phases separated by rest times, said positive phase train immediately followed by a negative phase train including a streak of constant current negative phases separated by rest times, each of said positive phases and said negative phases intended to provide a predetermined amount of charge to the head of the user, wherein each of a first time ratio, between a cumulative duration of said rest times between said positive phases in said positive phase train and a cumulative duration of said positive phases, and a second time ratio, between a cumulative duration of said rest times between said negative phases in said negative phase train and a cumulative duration of said negative phases is smaller than a predetermined threshold ratio; at least one sensor adapted, when said head mounted device is donned by said user and during transmission of said pulse, to engage the skin of the scalp and to monitor an amount of charge delivered by said positive phases and said negative phases; an electronic circuit, functionally associated with said at least two electrodes and having a compliance voltage; and a processing unit, functionally associated with said electrodes to provide instructions thereto and with said at least one sensor to receive input therefrom, said processing unit programmed to: (a) receive input from said at least one sensor; (b) identify in said received input a reduction of charge delivered by one or more of said positive and said negative phases; (c) upon identification of a said reduction, to provide input to said electrodes causing adaptation of at least one said rest time in at least one of said positive phase train and said negative phase train; and (d) repeat steps (a)-(c) until: said predetermined amount of charge has been provided by each of said positive and said negative phases; or at least one of said first time ratio and said second time ratio reaches said predetermined threshold ratio and a voltage of said balanced pulse reaches a predetermined voltage threshold. (a) receive input from said at least one sensor; (b) identify in said received input a reduction of charge delivered by one or more of said positive and said negative phases; (c) upon identification of a said reduction, to provide input to said electrodes causing adaptation of at least one said rest time in at least one of said positive phase train and said negative phase train; and (d) repeat steps (a)-(c) until: said predetermined amount of charge has been provided by each of said positive and said negative phases; or at least one of said first time ratio and said second time ratio reaches said predetermined threshold ratio and a voltage of said balanced pulse reaches a predetermined voltage threshold. said predetermined amount of charge has been provided by each of said positive and said negative phases; or at least one of said first time ratio and said second time ratio reaches said predetermined threshold ratio and a voltage of said balanced pulse reaches a predetermined voltage threshold.