The new ATMOS® Strobo 21 LED is a stroboscopy system that takes advantage of LED technology. LED technology has permitted the delivery of stroboscopy without reduction, vocal cord diagnostics with a pilot light that does not flicker, a standing image, and slow motion mode. The majority of laryngoscopes are appropriate for further use. Moreover, it is integrated with audio output that archives audio signal. It has a foot switch that freezes image with variable phasing and can be used to go to slow motion mode together with preselection of frequency. It has an easy-to-read LCD display that shows voice frequency as well as sound pressure level. The package comes with ATMOS® LS 21 LED, a rigid, low-current, and portable source of cold light that can be connected easily to existing endoscopes. The ATMOS® Strobo 21 LED gives off perfect white color temperature. Also, the light source has a very long service life of approximately 50,000 hours.