The Seguro SSG704(I): GSM, DCS, 3G & 4G Mobile Signal Booster is an all-in-one tri-band signal amplifier solution that functions across networks tuned to the frequency of 900,1800 and 2100MHZ. SSG704(I) is an ideal solution for shops, offices and homes and ensure seamless connectivity, increase data speed and eliminate call drop problem permanently. Similar to all our boosters, SSG704(I) series come with a one-year replacement guarantee and quick installation guide.