MEE audio KidJamz safe listening Bluetooth wireless headphones utilize a built-in volume limiter to maintain the sound pressure level (SPL) below 85dB, 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. Compatible with all Bluetooth audio devices as well as devices that use a standard 3.5mm (1/8") headphone/AUX jack; 3.5mm audio cable included.