DF4000 Compass Health. COMPASS HEALTH IF 4000 ANALOG INTERFERENTIAL UNIT. 4000 Analog Interferential Unit, System Comes Complete with: Device, AC Adaptor, Lead Wires, Four Self-Adhesive Reusable Electrodes, 9-Volt Battery, Carrying Case, and In

DF4000 Compass Health. COMPASS HEALTH IF 4000 ANALOG INTERFERENTIAL UNIT. 4000 Analog Interferential Unit, System Comes Complete with: Device, AC Adaptor, Lead Wires, Four Self-Adhesive Reusable Electrodes, 9-Volt Battery, Carrying Case, and Instruction Manual, Basic Assembly Required, 1 Year Warranty (EA). *****WE MAY CHARGE EXTRA SHIPPING FEE FOR THIS PRODUCT. PLEASE CONTACT US FOR SHIPPING FEE.***** The IF-4000 helps control pain and speeds the healing process by delivering small pulses of electrical current to an injury through electrodes. Interferential therapy is used for very localized areas where deep current for pain control or increased circulation is needed.