Criss Cross Sacro Lumbar Support XX Large 50 56 Ladies' 8 15 Knee Highs Includes Device batteries lead wires Style:Pair (Left & Right) Includes Device batteries lead wires 1 4pack of electrodes carrying case and users manual * Channel: Dual Channels Isolated between channel * Output Maximum 130 mA (peak value) across 500 Ohm load * Pulse Width From:50 ÊS to 250 ÊS adjustable * Pulse Rate:2 Hz to 150 Hz Adjustable * Wave Form:Symmetrical bi phasic rectangular Monophasic rectangular * Operates on 2 AA batteries (included) * Timer For spot checks or continuous monitoring Nonin Recommended for relief of lower back pain * Helps stabilize lumbar sacral and abdominal muscles and ligaments thereby reducing stress on the lower spine * Criss Cross bands at back provide a broad area for low back support * 6 wide overlapping elastic bands permit garment to fit a variety of figure types * Criss Cross Back features one way stretch elastic with hook and loop closures * Ideal for support of abdominal muscles weakened from repeated surgery * Provides relief for muscle strains and sprains * HCPC CODE L3923