* Guitar: The song features prominently a distorted electric guitar with a sustained riff throughout the verses.
* Synthesizer: A variety of synthesizers are used to create the electronic sounds and beats in the background.
* Drum Machine: A drum machine provides a steady, programmed rhythm for the song's percussion.
* Percussion: Additional percussion instruments, such as claves and shakers, accent the rhythm.
* Bass: A bass guitar adds a low-end foundation to the song's arrangement.
* Vocals: Katy Perry's vocals are processed with effects, including distortion and vocoding, giving them a unique and futuristic quality.