... communications cannot work well due to leak of signals. The repeater device features easy installation & operation, build-in indoor antenna ... device for boost mobile phone signal. A mobile phone repeater could also improve indoor electromagnetism environments, protract cellular battery ... . Suitable for 800-2500mhz ( CDMA,GSM,PCS,DCS,2.4G wifi suitable ) ;4. Max. power : 50W ;5. Impendance : 50Ω ;6 ...