KIDJAMZ VOLUME-LIMITING TECHNOLOGY: KidJamz headphones utilize a built-in volume limiter to maintain the sound pressure level (SPL) below the recommended 85dB limit, keeping young ears safe and helping build lifelong good listening habits; hidden controls let parents disable the volume limiter temporarily so KidJamz can still be enjoyed in noisy environments, such as while traveling DESIGNED WITH KIDS IN MIND: we set out to make KidJamz as comfortable and frustration-free as possible, utilizing an adjustable headband, swiveling earcups, and padded earpads and headband cushion to provide a comfortable and secure fit for boys and girls ages 4+ DURABLE CONSTRUCTION: engineered with fewer moving parts, the KidJamz KJ45 provides outstanding durability with a wear-resistant finish and flexible headband that can be bent and twisted in any direction without breaking BUILT-IN HEADSET: Integrated microphone can be used for online learning, video chatting, gaming, and phone calls, while the built-in controls let kids adjust the volume and control media and phone calls without reaching for their phone or tablet each time WIRED+WIRELESS FOR MAXIMUM COMPATIBILITY: works with all Bluetooth audio devices as well as devices that use a standard 3.5mm (1/8”) headphone/AUX jack including Kindle Fire tablets, portable gaming devices, mp3 players, PCs, laptops, gaming consoles and controllers, and portable DVD players; 3.5mm audio cable included