Super MINI Earbud The Smallest Invisible Earbud Magnetic Earpiece Earbud Package including ( Excluding the cables, work well withamplifier neckloopsorother amplifier equipment)20 x Smallest Earbud20 x Big magnet10 x StickerThis mini earpiece is an electromagnetic wave inductive and receiving device with a micro earpiece designed to fit exactly in ear canal for secret communication. The sound is clear, but not as loud as a normal earphone, so it's not recommended to use in a loud area. How can it be used?-Communication for Security-Students-Law enforcement-Private investigators-Business Professionals1) How do you wear the earpiece?- Clean and dry out your ears thoroughly before use-Wear the loop set, connect batteries & connector & plug the jack into your phone-Turn volume on the lowest setting-Turn your head to the left or right so your ears are horizontal to the ground and ceiling. Place the earpiece in your ear. You will hear a noise when it touches your ear drum. NOTE: It must touch your ear drum to function. If not, the sound will be too quiet-Slowly turn up volume2) How do you take it out?-Place the magnet near your ear canal and slowly turn your head so your ear is parallel to the ground. Gravity and the force of the magnet will pull the earpiece to the magnet. It may help to use a metal stick on the end of the magnet3) Does the earpiece require power?- No, power comes from the loop set by the batteries4) The volume is too low or I can't hear anything. Why?-This means it was not positioned correctly. It must touch the ear drum to function correctly. Remove the earpiece and position it again5) How is the sound quality when it's in my ear?- The sound is clear because the system doesn't product any background noise. If you hear any abnormal noises, check your phone6) Can I listen to music?- Music requires a hifi earphone. It's not suggested to use for music