Interferential Stimulator Dual Channel IF4000 Low Air Loss Systems 75 with riggings 26 MSHQ 1594XL 75 with riggings 26 This foam filled pad is available in two sizes * It is covered with a durable nylon cover that wipes clean * It is sturdy enough for jumping on and soft enough for sitting and relaxing * It is a helpful tool for improving vestibular senses * Safe long lasting foam filled bag * Shipped with the foam compressed for reduced shipping cost * 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)