We present time-series spectroscopy and multi-band photometry of the sdBV PG 1605 + 072 carried out simultaneously at the Calar Alto 2.2m and 3.5m telescopes .
The periodogram analysis of the radial velocity curves reveals three frequencies at 2.078 , 2.756 , and 1.985 mHz for \mathrm { H } _ { \beta } and at 2.076 , 2.753 , and 1.978 mHz for \mathrm { H } _ { \gamma } .
The corresponding radial velocity amplitudes are 12.7 , 8.0 , and 7.9 km/s for \mathrm { H } _ { \beta } and 14.3 , 6.5 , and 7.2 km/s for \mathrm { H } _ { \gamma } .
Furthermore , we found five frequencies that are present in all wavelength bands of the BUSCA photometer .
The frequencies detected in the radial velocity curves are recovered by the photometric measurements .
Moreover , additional frequencies were present in the periodograms which could not be identified in all four bands simultaneously .
The comparison of the amplitudes presented here with previous results from radial velocity and photometric observations of PG 1605 + 072 shows a significant change or even switch in the power of the modes within short time scales , i. e. about one year .
No changes in frequency were registered and the phases of the modes show no wavelength dependency within our multi-band photometry .