The red ball jett organ, alternatively referred to as the red ball organ or nalargon, functioned as a keyboard instrument and is recognized as the defining instrument associated with Maximilian Rebo. This particular instrument was equipped with 21 keys and possessed the capability to save both musical tracks and audio recordings.
Although its identification was initially unknown, the red ball jett organ made its initial debut in the cinematic production Star Wars: Episode VI Return of the Jedi, which premiered on May 25, 1983. Subsequently, in a 2015 Topps trading card, the instrument received its identification as the red ball jett organ. The Databank located on StarWars.com initially designated the instrument as the red ball organ; however, this was later revised to incorporate its complete designation.
During a collaborative event with the video game Fortnite in 2024, the red ball jett organ was incorporated into Fortnite Festival as a Keytar cosmetic addition. The actual musical instrument also featured in a limited-time Star Wars-themed segment of the Jam Stage. Fortnite referred to the instrument as Nalargon; nevertheless, the canonicity of this in-game identification remains uncertain. Leland Chee later clarified that there are no strict rules prohibiting identifications originating from Fortnite, suggesting it is reasonable to accept it as canon.