Left: LS periodogram of the residuals of the LC fit of KIC 4150611, with the second period of eclipses (1.43421 d) removed. Peaks representing δ Sct and γ Dor pulsations of the component Aa are seen at frequencies >16 and ~2.6 d^-1, respectively. Middle: enlargement of the frequencies around the highest peak of the γ Dor pulsations. The arrow marks the 23-rd harmonic of the 8.65-d period (23/8.653094 d^-1). Right: enlargement of the frequencies corresponding to the rotation period. Their structure suggest differential rotation and/or that they come from two stars.