This 2-channel electrotherapy unit with an extended range of currents allows you to treat 2 patients at the same time, independent of each other. The system is preset with over 5000 electrotherapy wave forms that have been identified after years of medical research. The device can be adjusted to use either manual settings or one of the pre-programmed protocols and can also also be interfaced with the BTL Vac. With a high luminance display for timer and other factors, it is easy to know exactly what frequency you're using and for how long. The device is entirely portable with a built-in rechargeable battery. The most important frequency wave forms included in the device are: galvanic, diadynamic, 20 programmable sequences, trabert, faradic, neofaradic, Russian stimulation, stimulation pulses, rectangular pulses, TENS, 2 and 4 pole interference, triangular pulses, exponential and combined pulses, isoplanar filed, dipole vector (hand & auto), interrupted pulses, Leduc current, H-wave, and microcurrents.