These headphones come equipped with an adjustable volume limiter to provide a safe and optimal listening experience for iOS and/or Android users. (See back of packaging for more details) Connect to any audio device with the line-in jack and listen to whatever you like. Enter a world of your own and enjoy crisp quality sound from the makers of iHome. Padded pivoting ear cushions and an adjustable headband allows for a comfortable custom fit. This will make the perfect gift or birthday present for your little Firefighter!