We are offering digital i.f.t unit is an advanced electro therapy requirement unit micro-controller circuit. Its digital display system indicates output current intensity and treatment time. technical specification: base : 0-150 hz sweep : 0-100 hz carrier frequency : 4, 2 hz therapy modes : 4 pole, 4 pole vector, 2 pole output current : 0-100 ma timer : 0-99 minutes