ACTIVE NOISE-CANCELLING HEADPHONES: The ANC switch puts the world on mute so that kids can listen clearly in loud environments.These headphones make daily noise and background sounds up to 22 dB quieter, complemented by 82% noise isolation (@ 1 KHz). LIMITED VOLUME FOR KIDS’ HEARING SAFETY: A limited volume of 85 dB is the maximum safe sound listening level as recommended by many organizations. Intelligent digital signal processing imperceptibly limits the volume so that listeners don’t even notice. WIRELESS HEADPHONES WITH BLUETOOTH FUNCTION: The one-touch Bluetooth pairing with iPhone, Android, and other compatible devices makes for hassle-free listening! The wireless mode eliminates all dangers of entanglement in audio cables.