Light curve, frequency spectrum, and blue spectrum of the binary star EPIC 223160833 (ALS 4393) whose primary is a β Cep variable. The K2 light curve in the upper panel is characteristic of an eclipsing binary with an orbital period of ~4.9 d. The middle panel displays the frequency spectrum, which shows frequencies typical of both β Cep and SPB variables. The star is thus classified as a hybrid. The frequency corresponding to the binary period is marked with a red dot, at ~0.2 day⁻¹. The lower panel shows the blue spectrum of the star, with prominent Balmer and He He I lines which is consistent with a B2 III spectral classification. The lines of the companion of this bright β Cep star are not visible.