Clinicians can choose from a broad range of waveforms, including Interferential, Pre-modulation, Medium Frequency and Biphasic with adjustable phase duration and frequency. Additional versatility is provided by a selection of treatment modes that include Surge, Reciprocation, Surge with Reciprocation and Vector Rotation. The Sys*Stim 226 can be set up in the two-timer mode so two separate treatment protocols may be run simultaneously.