⭕ Excellent and working complete system comes with stand and manuals and 19 months old. Cadwell Sierra II Wedge EMG machine includes laptop computer, Sierra II Wedge base controller console, nerve conduction stimulator, 2 channel amplifier, configured , all interconnect cables, latest Sierra software. The Sierra II Wedge has been an industry workhorse. The system comes in a 2 or 4 channel configuration and includes protocols for EMG, NCV, F Wave, H-Reflex, RNS, and Blink Reflex plus the complete range of Somatosensory, Auditory, and Visual Evoked Potentials testing. Special features include a custom keyboard for convenient, one-button access to important test controls, an intuitive software interface, and a customizable report generator.