What is important is that you buy one of the newer versions (Piston V2 or V2.1) and falls for no case to one of the forgeries. To this end, unfortunately it requires a little research work. The negative reviews here on Amazon seem to underlie all V1 models or fakes.
The original Piston V2 You can identify on the packaging (paper / cardboard), which is kept simple and the front top right a simple MI Logo has but just no character in the middle. Another important feature are the specs on the back. With the newer models and original here is 5mW, with the older or fake will probably appear there 3mW. Furthermore smell the rubber insert (on the headphones are wound) in about after chocolate, which is willed by Xiaomi well as a distinctive way. Also contains the box of the models V2 and V2.1, a metal clip for attaching, the first batches of Piston V2 should have no. In addition, the originals still have a QR code attached to the cable. The golden color of the headphones is also very discreet, whereas the fakes are contrary golden properly striking.