Fits most DJ foldable headphones format Sennheiser HD 25, Sennheiser HD 25 PLUS, Audibax RH5, Audio Technica ATH-M50X, Audio Technica ATH-M50X-BT, Audio Technica ATH-M40X, Pioneer Dj HDJ-X5K, Pioneer Dj HDJ-X5BT-W, BEHRINGER HC 200, BEHRINGER HPX4000, BEHRINGER HPX6000, Pioneer Dj HDJ-CUE1, Pioneer Dj HDJ-CUE1BT BK or similar