Flexibility is key to Sys*Stim 226s winning ways. Treatment waveforms include Interferential, Pre-modulation, Medium Frequency and Biphasic with adjustable duration. For added versatility, choose from Surge, Reciprocation, Surge with Reciprocation and Vector Rotation modes. Whats more, the Sys*Stim 226 offers combination therapy with any waveform, giving you the ability to control independent therapies on different parts of the body, or even on different patients.