You create an illusory copy of yourself that lasts for the duration. The copy can appear at any location within range that you have seen before. The illusion looks and sounds like you but is intangible. If the illusion takes any dmg, it disappears, and the spell ends. You can use your action to move this illusion up to twice your speed, and make it gesture, speak, and behave in whatever way you choose.
You can see/hear through its eyes and ears. As a bonus action, you can switch from using its senses to using your own, or back again. While using its senses, you are blinded and deafened to your own surroundings.
Physical interaction with the image reveals it to be an illusion, because things can pass through it. A creature making a successful Investigation check against your spell save DC can discern the illusion for what it is.
a small replica of you made from materials worth at least 5gp