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Smoothtalker Mobile X6 series is the highest power multi-user, multi-device vehicle booster available. This booster will keep you connected where other boosters fail. Rugged cast aluminum construction provides superior shielding, heat dissipation and longevity. Includes rugged magnetic mount 2 inch stainless steel antenna. This 3G,4G,LTE Signal Booster Kit covers the following Cellular Frequency Bands: Band 12/17 (Lower 700MHz), Band 13 (Upper 700 MHz), Band 5 (850 MHz), Band 2/25 (1900 MHz) Band 4 (AWS 1700/2100 MHz).