The Hamilton Guardian CD/Cassette/AM-FM Listening Center include everything you need for classroom audio for up to 6 students at a time.This listening center features Guardian Headsets with Sound Level Monitor (SLM) Technology - Deliver SAFE SOUND to your students. Each Guardian headphone has LEDs that allow you to see the level of your students volume from across the room. The green LED indicates a safe listening level for your students that won't harm their ears. The red LED when lit alerts you that the child may have a hearing problem or is at risk of causing irreversible damage to their ears.Listening Center Includes: - (1) MPC-5050 Boom Box: This fully programmable CD player with repeat play records from CD, radio or built-in microphone and receives AM & FM stereo broadcasts. Comes with attractive silver blue housing with 2-way power - AC/DC - or operates on 8 " C" size batteries (not included). UL listed. One (1) year warranty. - (6) Hamilton HA31 Guardian Headsets with Sound Level Monitor, Stereo/Mono Auto-Switching, noise-reducing, fully adjustable - (1) Stereo jackbox with individual volume controls - (1) Large, durable, lockable carry case with protective surround foam (lock not included) - Weight: 24lbs - One Year Warranty