Multi-Universe Hologram Uplink
Type: Commutation device
Owner: Penn Zero
First appearance
First episode: "North Pole Down"
Latest episode: "At the End of the Worlds"

The Multi-Universe Hologram Uplink, shortened to MUHU, is a device that allows people in different dimensions to connect and keep in touch. Penn Zero wears it on his belt and uses it to check in with his parents Brock and Vonnie.[1]


  • In "North Pole Down", the MUHU is destroyed by falling and shattering, but Santa fixes it and returns it to Penn for Christmas.
  • As of Season 2 Penn's MUHU now glow green when they are in a world that contain a crystal, however it was not upgraded yet at the beginning of the first episode of the second season.