🔧what is inside the LCD writing pad/Boogie Board and how it works? [हिंदी] 

LCD writing pad ya boogie board ke andar kya hai aur ye kaam kaise karta hai is video me maine khola vbhi hai bola bhi hai🤣.
and sorry yaar video smooth nahi hai and knowingly maine wahi video dala hai taki aap tak wahi pahunche jo sach ho, hope u will support.
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