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Impression Pi or Impression π is a mobile [[Virtual Reality]] and [[Augmented Reality]] [[Head-mounted Display]]. In addition Similar to built in rotational tracking[[Samsung Gear VR]], Impression Pi requires the insertion of a smartphone for its display and processor. The [[HMD]] has built -in positional tracking in addition to rotational tracking. The device has two front facing cameras that enables it to not only create [[AR]] overlays but also track the motion of your hands and fingers.