Built-in wireless listening center. The learning center supports phonemic awareness, phonics, comprehension, vocabulary, literacy groups, ELL, ELD and other language learning programs. Its wireless (infrared) audio transmission / reception resists outside interference, while creating the flexibility to move about the classroom. 6 Watts RMS powerful enough for up to 75 people. Built-in electret mic records student progress and won’t get lost. CD player with CD, CD-R, and CD-RW compatibility. Dual infrared transmitters for wireless listening. Phase Lock Loop (PLL) digital AM/FM stereo. Steel grilles protecting recessed speakers. External casing made with rugged ABS plastic for safety and durability in high-use situations. Dual cassette recorder/players also record from the CD player, radio and microphone inputs. Full-function remote (RC-2300) for classroom flexibility Six Infrared Headphones. 15’ line of sight range for up to twenty students. Noise-reducing earcups made with rugged ABS plastic Runs on AC/DC power for indoor/outdoor uses One year warranty for school use - unlike items purchased from consumer electronics stores whose warranties would be voided if used in schools.