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; a hidden button combination lets parents disable the volume limiter temporarily so KidJamz can still be enjoyed in noisy environments, such as while traveling LIGHT-UP DESIGNS & 4 AUDIO MODES: multicolor LED lights with 8 color patterns illuminate the graphics on each ear cup, giving each KidJamz headphone a vibrant and unique style; optional customization with a personalized name, graphic, or logo is also available; plus, 4 distinct audio modes let kids further personalize their listening experience at the touch of a button DURABLE & COMFORTABLE: engineered with fewer moving parts, padded earpads, and a flexible cushioned headband, KidJamz provide outstanding durability and a a comfortable and secure fit for boys and girls ages 4+ HYBRID 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; a built-in rechargeable battery provides up to 40 hours of battery life in Bluetooth mode BUILT-IN HEADSET & CONTROLS: 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