Hello Kitty Unicorn headphones in the rainbow unicorn colour palette are especially for small, delicate eardrums as these headphones are restricted to 85 decibels & have been tested/passed as suitable for children aged between 3-7 years. Adjustable padded headband with soft touch ear pads for comfort. Compatible with all devices using a 3.5mm universal jack (i.e. smartphones, tablets, laptops, etc.)