The microprocessor-controlled Sonicator Plus 940 is a four channel combination unit. It combines 1 and 3 MHz ultrasound with eight treatment waveforms: Interferential, Premodulated, Medium Frequency (Russian), EMS, High Volt, TENS, Microcurrent and Direct Current (DC). All waveforms are available on all four channels. A dual-frequency 5.5 cm², 1/3 MHz applicator comes standard with the unit. The membrane panel and back-lit LCD touch panel allow the clinician to quickly setup treatment parameters. There are 61 preset programs and space for 80 user-defined programs. An optional 0.9 cm² dual-frequency applicator is available.