To ensure precision radiation of the: environmental object with low activity, low-background efficient scintillator single crystals scheme and testing results for a highly efficient portable spectrometer for simultaneoius and independent registration of spectra of electrons aind gamma-quanta. A complex detector based on cadmium tungstate and organic molecular crystals in a bulk is used as a sensitive element. The device is characterized by long-te:rm stability, high data reproducibility, absence of any effects of the hard component of the outer space radiation and partial suppression of the outer gamma-ray background without shielding by means of the detected energies is 0.03 -3.3 MeV for gamma-quanta, 0.04 -3.5 MeV for electrons , and 4.0 -8.0 MeV for alphaparticles.Registration efficiency for "Sr + radiation is about 85%, 13'Cs -90%. The intrinsic background of CdW04 is 0.01-0.02, and for para-terphenyl -0.06 pulses/ cm3 keV hour in the hour in the energetic range of 0.1 -3.0 MeV.