The 85 dB relates to headphone and music player combination. These headphones have been limited by impedance based on 60 mW output and higher than average music production values. Sound-limiting technology Blocks out background noise so you don't have to crank it up to max Retro design based on the style being worn by top DJs Fully adjustable and soft cushions make them really comfortable In-line volume control 85 dB Thanks to their sound-limiting technology, the KS Levellers headphones let you listen to your beats without bursting your eardrums. At KS we believe in not only making the best quality products we can, but also in the importance of your ears. The Levellers are equipped with sound-limiting technology, and to ensure that you can hear your music without having to crank it up to maximum volume, insulated the outer shell of the earcups to reduce background noise. Research has shown that listening to loud music over a long period of time can potentially lead to noise induced hearing loss (NIHL). These headphones have been engineered so that the level of sound being delivered to the ears does not exceed an average of 85 dB - which is the figure recommended by healthcare professionals. As well as their retro design which is based on the style being used by top DJs, the Levellers are also really comfortable to wear. They're tough yet lightweight, have super soft cushions and are fully adjustable, so whatever size your head is, you'll always get the perfect fit.