Teenage Engineering Rare Unreleased Stem Player Demo Video https://www.youtube.com/shorts/19OfQzrqUKM These devices were manufactured but never sold by Teenage Engineering or Kanye West. This was a collaboration with Kanye West, pre-loaded with his 2019 album "Jesus Is King." You can adjust the levels of different audio tracks and add effects. It can also be used as a looper. With the current firmware, you cannot add or record other music, but a volunteer team is developing custom firmware that may allow you to add other music in the future. I have confirmed that it works, but it is unused. A USB-C cable is included. #TeenageEngineering #OP1 #PocketOperator #KanyeWest