Radiofrequency electromagnetic field (RF EMF) wireless personal telecommunica- tion devices may be the reason of increased adverse human health effects. The most of recent studies analyze the possible health hazards of cellular phone EMF only. The goal of research was to investigate the Digital Enhanced Cordless Telecommunication (DECT) EMF biological effects to animal behavior and reproduction function. EMF exposure parameters: frequency 1890 MHz, continuous wave (CW), power density 250 µW/cm2 (exposure time 2 hours/day; 5 days/week; 4 weeks) and 500 µW/cm2 (3 hours/day; 5 days/week; 4 weeks). The objects: white rats male (330–350 and 200–220 g). Each exposed group had sham exposure. The evaluated parameters: weight (body, spleen, adrenal glands, testis), behavioral parameters (open filed test), the func- tion of reproduction system (epididymis sperm count, sperm osmotic resistance). Exposure value 500 µW/cm2 : significant decrease of rats’ behavioral parameters after 5 days; decrease of be- havioral parameters, sperm osmotic resistance, spleen and testis weights after 10 days; decrease of sperm osmotic resistance and body weight after 20 days. Exposure value 250 µW/cm2 : sig- nificant decrease of rats’ sperm osmotic resistance after 20 days of exposure and 2 weeks after exposure, as well as significant decrease of adrenal glands weight and epididymis sperm count 2 weeks after exposure. There were carried out the simulation EMF exposure experiment. The simulation helps to find the dependency interrelation between power density, power exposure and specific absorption rates. The results showed that exposure to CW EMF at 1890 MHz with 500 and 250 µW/cm2 may lead to adverse health effects on reproductive system of male rats; and using of DECT devices may be evaluated as possible human health risk factor.