Transmisor de audio de bobina de cobre, transmisor de voz inductivo, bucle de inducción para auriculares con nanoimán, audífonos.

DIY Copper Coil Loop Audio Sender Voice Inductive Transmitter Induction Earphone . pick voice from 3.5" jack old mobile phone . send voice to nano magnet earpieces iF YOU need it to work on type-c output Android phone , please choose extra converter cable . For old mobile phone with 3.5" earphone hole . Before use ,please connect to two 9V 6F22 batteries as below ( you buy battery in your local market ) . differences and shipping content : 1. Earphone loop set with magnet 1 big 2 small 2. Earphone loop set with Magnet  4 big two small magnet 3. Earphone loop set with Magnet 1 long 2 small magnets : 4. Earphone loop set with 1 long 1 big 2 small magnets The recommended choise for nano magnet sets : 1 long 1 big 2 small magnets > 4 big two small magnet > 1 long 2 small magnets > 1 big 2 small 5. Earphone loop set with 108B 6. Earphone loop set with 108B + 1 337 Battery **Because of shipping restrictions , shipping fee for SR6SW 337 battery which used for earphone is expensive ,so price is big different . We recommend so please buy it in your local market . Where to put small magnet : Only put small magnet into ear drum ,otherwise , it will not have any voice . How to put small magnet : Turn your head to the left or right so your ears are horizontal to the ground and ceiling.Place the earpiece in your ear, shake head and let it fall into ear drum . when you have it near to ear drum ,you will feel a little uncomfortable ..but it will not hurt your ear drum , do not need worry about it . After your finish ,just use big magnet close to your ear to extract small magnet out . How do you take out the earpiece? -Place the big 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 magnet for extra control. Shipping and noted : 1.  We will ship out goods ASAP during 48-72 Hours ,( during holiday,it will be up to 7 days  )  after payment ; 2.  Buyer / Receiver is responsible for import license , customs clearance , pay for duty in customs or local fees in destination ; a). Shipping by post or Aliexpress standard can have lower possibility to pay for custom duty , not promise ,only lower possibility . b). Shipping by express such as DHL ,UPS ,FEDEX , high possibility to be asked to pay for custom duty . 3.   When goods arrived, if any service is in need ,please freely contact us . 4.   All goods will be provided with 1 year quality warranty. Freely contact us .