https://www.presse-citron.net/amplificateur-gsm-solution-amplifier-signal-reseau-mobile/ - The repetiteur gsm/ amplifier receives the mobile telephone signal having a tiny external antenna, then amplifies the signal and then transmits the signal for your living room or workplace. Interference-free & easy to put in yourself. Convenient for all mobile phones and networks. Including SMS, GPRS, and mobile Internet!This mobile phone signal repeater provides the ultimate solution in virtually any location where cellular communications can not work well due to a leak of signals. It could also improve indoor electro-magnetism environments, protract cellular battery lifetime and decrease radiation of cellphones.