Intelect® Legend 2 four-channel combo device is a four-channel electrotherapy, ultrasound therapy (1 and 3 MHz) and combo system. Twelve waveforms are included for electrical stimulation: VMS, Interferential, Premodulation, Asymmetric Biphasic, Symmetric Biphasic, High Volt, Microcurrent, Russian, VMS Burst, HAN, Direct Current, VMS FR,