... and 1900MHz 3.CE,FCC 4.2 Years Warranty Dual band signal repeater/booster Key features:Small Size, Light Weight, Beautiful ... with 850/1900MHz for the following Service Provider: Sprint, T-Mobile, Alltel, AT&T, Verizon, Metro PCS, U.S. Cellular, ... cost effective solution for small business application with weak outside signal, it is best used in the following applications:Office Enterprise ...