Protect your hearing in any environment while still listening to your favorite music and taking calls Saf-T-Ear offers full 40db NRR hearing protection as you enjoy all of your media Quickly easily and safely control how loud your music is through using the controls integrated into the convenient 20" neck wrap cord Works on Android iPhones iPods smart speakers any device that uses Bluetooth connectivity Tons of uses around the home at work or at play Shield your ears from howling lawnmower motors and screeching power tools Increase your enjoyment at concerts! You can enjoy the loudest rave or rock act around in safety and in complete control At work shield your ears from construction and heavy machinery noise How to use 1 Select the proper size ear tip to fit your ear canal It should form a complete seal blocking out sound This is critical to achieve the highest NRR rating and protect your hearing 2 Compress the foam tip by rolling between your fingers Quickly insert compressed foam tip into your ear before it expands and seals the ear canal Hold in place for approximately 10 seconds to ensure the tip expands and seals the ear canal 3 Test this with the headphone turned off clap your hands and listen to the sound level If the earbuds are the correct size and properly inserted the outside sound should be significantly muted If not take the foam tip out of your ear canal and repeat previous steps