Interferential Stimulator Dual Channel IF4000 Bed Rails Fall Protectors Made of Steel 19 BLACK Style:1 Pair (Left & Right) Made of Steel 19 BLACK UPHOLSTERY * Silver Vein Frame * Back folds down for storage and transport * Swing away footrests come standard * Comes with seat belt for added safety * Padded armrests provide additional comfort * 8 casters in front and rear * Comes with attractive nylon upholstery that is durable and easy to clean * Standard rear wheel locks * Comes with upholstery handles to fold chair * Overall width w 19 seat: 23 (open) 8 (closed) * Overall height: 39 * Seat to floor height: 19 * Back height: 18 * Seat depth: 16 * Overall length w riggings: 33 * Weighs only 26 lbs * Carton shipping weight: 31 lbs * Weight Capacity: 250 lbs * Limited Lifetime Warranty * HCPCS Suggested Code: E1038 Thigh Hi (Lace Silicone Strap) * Natural * 20 30 mmHg * Large * Ankle Circimference 10 11 3 8 Thigh Circumference 21 1 4 30 3 4 * Hip Circumference 32 54 * Beautifully sheer hosiery Durable long lasting * Sandalfoot styling * Gradient compression for relief and prevention of venous disease * Therapeutically effective sheer lightweight and fashionable * Dual Channel * 4000 mHz * Unit comes complete with: set of 2 wires pack of 4 silver silver chloride self sticking electrodes 9V alkaline battery ac adaptor instruction book and attractive carry case * Dual channel quadra polar * Adjustable pulse amplitude * Carrier frequency plus interference frequency * Sweep and treatment timers * Shipping Carton Size: 12 L x 10 W x 6 H * HCPCS Suggested Code: E0730 * Interferential stimulators use a fixed carrier frequency of 4 000 Hz per second and also a second adjustable frequency of 4 001 4 400 Hz per second * When the fixed and adjustable frequencies combine (heterodyne) they produce the desired signal frequency (Interference frequency)