zBoost ZB575-V TRIO SOHO Tri Band Verizon 4G Cell Phone Signal Booster, up to 2,500 sq. ft. High Performance Tri-band Signal Booster-coverage Up To 2,500 Sq Ft (up To 70 Db System Gain) Ideal For Homes & Buildings That Have Reliable Outside Connection Reduces Dropped & Missed Calls & Provides Faster 4g Data Performance For Multiple Simultaneous Users Compatible With Mobile Phones & Devices Operating On Verizon 4g Lte, Cell (800 MHz) & Pcs (1900 MHz) Extends Phone Battery Life