Unna Pak® Primer® Unna Boot and Duban® Self Adherent Bandage, 4 Inch x 10 Yard, 1 Each Spirometers retracted and flush stomas Select Ear:Left Ear retracted and flush stomas cut to fit openings 2 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 A convenient system containing two high performance bandages that together form a two layer Unna boot strong and easy to apply