Biomedical Life Systems BioStim SD Digital TENS Unit 3-8/9" x 2-1/2" x 1-1/9", 3-1/4 oz. Weight, 1 to 200Hz, Dual Channel, 2 AA Battery E-block Type 6F22 Power Source, Asymmetrical Biphasic Square Wave Device has continuous, cycled burst, SD1, and SD2 programmable functions. Comes with lead wires four 2? x 2? self-adhesive reusable electrodes, two AA alkaline batteries and carrying case.5 year warranty.
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