Dual-channel microcurrent unit Modified, square, DC, biphasic waveform with pulses of 0.3 Hz, 8 Hz and 80 Hz, changing polarity at intervals of three seconds Timer can be set of 20- and 40-minute treatment periods; or continuous Includes stimulator; lead wires; one pack (4) electrodes; 9-volt battery; hard-sided, protective, plastic case; and instruction booklet |