The lyrics start each line with the word, "전기충격" ("jeongichunggyeok", meaning "electric shock" in English).

It was written and arranged by Willem Laseroms, Maarten ten Hove and Joachim Vermeulen-Windsant, and produced by Future Presidents.

The track "Zig Zag" was especially produced to focus on the "youthful and refreshing blend of vocals" of the five f(x) members which adds to the urban electronic sound created by the use of electric guitars and drum beats.

[2] The track "Beautiful Stranger" features Amber, Luna and Krystal only and has an urban and hip-hop feel.

[3] The song was composed by a team of music producers that included Aminata 'Amy' Kabba, Jason Gill, and songwriter Mich Hansen ("Cutfather").

[7] The title track debuted at number one on the Gaon Digital Chart, selling 630,510 copies in its first week.