Quick view Mettler Sys*Stim 228 Interferential Stimulator Unit Mettler Sys*Stim 228 Interferential Stimulator Unit The Sys*Stim® 228 neuromuscular stimulator has four discrete waveforms: Interferential, Premodulated, Medium Frequency (Russian) and Biphasic waveforms. In addition the clinician can set on/off... MFG Price $2,599.00 Sale $1,699.00 Add to Cart Compare Compare Selected