TOTE Oxygen Tank Carrier fits D Cylinder for Wheeled Walker Raised Toilet Seat Dual Channel * 4000 mHz Hip Kits 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) Heart rate can be expressed as the number of beats per minute or as percentage of your maximum heart rate Patent #6 672 321 * Carrier for D cylinder * Oxygen Cylinder Holder increased mobility and freedom for individuals who are required to use oxygen and a wheeled walker * Secures to the walker with 2 hook and loop fasteners and a safety buckle strap at the top and a centering strap near the bottom of the walker * Convenient pocket for the wrench * Manufactured and sold under U