Classroom Must Haves: The set contains 10 packs of different color headphones, each wrapped with a transparent bag. Studies have shown that colors develop the brain's creativity, productivity, and capacity to learn. Using them, teachers may ensure that kids get a fantastic experience every day they are in class. Quality, Durability: Nylon braided cable is strong enough to withstand excessive handling. Bendable headband quickly returns to its original form. Plug and cable connections have been cycle tested to 8,000 insertions/removals. Safety Always: This kid's headphone is made of non-toxic material, and meets CPC and CPSIA standards. The built-in volume-limiting circuitry keeps the sound below 85dB, meeting the WHOs recommended level for preventing hearing damage. Built-in Microphone: These headphones were created to ensure seamless use for school, with the included microphone and the StudyMode feature. Furthermore, this mic uses passive noise suppression to cleverly p