Dual-channel TENS neurostimulator from Medtronic's Dynex III line — a clinical-grade pain management unit trusted by physical therapists and chronic pain patients for decades. Features adjustable Pulse Width (40–250μs) and Pulse Rate (2–110Hz) dials, plus Mod/Normal/Burst mode toggle for customizable therapy. Includes belt clip, battery compartment, and original plastic storage case. Unit only — no leads or electrode pads included. Sold untested, as-is. Shell is solid with normal age-related wear. Great for collectors, parts, or buyers who have compatible leads on hand.