Cardinal Health™ Lithotomy Urological Drape, 65 x 35 x 118 Inch, 1 Case of 8 Oxygen Conserver Concentrators A film barrier prevents gases Hearing Aid A film barrier prevents gases that can cause unpleasant odors from escaping * STANDOUT FEATURES OF THE DEVICE: It's convenient to have a unit with professional quality medical electrodes but it needs to be easy to use for the average person * Have no fear the Ultima OTC has an easy to read backlit LCD screen that clearly shows text and body diagram * Pause and play buttons let you start and stop treatment as needed while the front closing door protects the controls so you won't accidentally change the settings while you use the device * 1 Year Warranty * Comes with 2 AA batteries * Urological drape includes an anesthesia screen " Tiburon fabric is lower linting than other currently available surgical drape fabrics when compared in laboratory testing