[. . . ] System 2013 PLL Mikroport 2013 PLL FM Assistive Listening System The MikroportTM 2013 PLL system, consisting of the EK 2013 PLL receiver for hearing-impaired persons and the SK 2013 PLL transmitter for speakers, represents a major advance in enabling people with impaired sound perception to play a fully integrated role in education, the workplace, and social settings. [. . . ] The transmitter must be body pack style with integral microphone with speech filter and optional lavalier microphone. It must include an auxiliary socket to connect to a separate audio source (e. g. The receiver must have an all-metal housing and be body pack style with optional chest strap. it must have 16 PLL selectable frequencies; priority circuitry, volume control for the integral microphone and the FM signal. Controls must be secured under a cover to avoid accidental readjustment. It must be capable of connecting to hearing aids via induction neck loop, DAI cable, headphones, etc. proper functioning must be easily identified by green and red LED's on the front of the receiver. Both components must be powered by either a rechargeable battery pack allowing for 12 hours of operating time or by two AAA alkaline batteries allowing for 40 hours of operating time. [. . . ] Fax: 514-426-3953 Manufacturing Plant: Am Labor 1, 30900 Wedemark, Germany [. . . ]