I received my new earphone when my neighbour came back from Mainland China. I bought Mi Piston Air Earphone online. Shipping address is his address in Beijing. It is in a very small box. Here is the look of the package box.


  • Type: In-ear
  • Speaker Impedance: 32 ohm
  • Weight: 14g
  • Cable length: 1.25m
  • Jack Type: 3.5mm gold-plated
  • Rated  Power: 5mW

Look the earphone:


Just wondering how to put in my ear. There is a card showing which way is correct and which ways are wrong.



I tried a few times and finally I made it.


And I checked it with my daughters’ ears. Not everyone can use this type of earphones. It depends on the size, the shape, the bones of their ears.

It is about $14 a pair.

I also bought two pairs of earphones for my two daughters. Their old ones are broken on the cable.

Theirs are better than mine. On the price side, $20 each.


This is the screenshot of the products.

David Yin

David is a blogger, geek, and web developer — founder of FreeInOutBoard.com. If you like his post, you can say thank you here

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