Voltaren Arthritis Pain Topical Gel, 5.29 ounce tube, 1 Each Laundry 4 Channel Electrotherapy * Easy to add modularity Urinals 4 Channel Electrotherapy * Easy to add modularity allows the addition of two additional channels of electrotherapy light therapy or a battery module * High contrast 5 (13 cm) FSTN LCD monochromatic user interface * Two independent electrotherapy channels expandable to four independent channels * Multiple waveform electrotherapy six clinical waveforms: Interferential Premodulated High Volt Russian Symmetrical Biphasic and Microcurrent * Documentation of treatment data with Patient Data Cards * User defined protocols for your specific needs * Dual frequency ultrasound at 1 or 3 Hint of strawberry kiwi flavor 1% diclofenac sodium (NSAID [nonsteroidal anti inflammatory drug]) Voltaren is a topical NSAID absorbed through the skin and not through the stomach like most oral medicines