Safe volume controlled technology: built-in volume-controlled circuitry that ensures the sound is within levels recommended safe for young children's eardrums and inner ear at 85dB ON/OFF LED Light : , you can choose to turn off the LED blinking effect so as to reserve more battery for longer music playing. good for universal compatibility: with the standard 3.5mm headphone jack, Works with virtually all smartphones The cat headphones are lightweight and portable, foldable and rotate for easy storage and carrying, you can be folded 90 degrees from the outside to the inside or up. The earmuffs are made of foam padded ear cushions for long-term comfort wear. Tension and elasticity are very moderate convenient To Carry: Foldable design make it convenient to carry, you can easily put it in the suitcase or bag, more easy to carry it. When you take your children out for a trip,take a car take a plane, this headphone would be a good companion Customer Service : If your kids do not like this headphones, please contact us and we offer a full refund for you, any questions please let me know before leaving a comment :) will be appreciated