ZBOOST YX645 LARGE APPLICATION CELLULAR PHONE SIGNAL BOOSTER INCREASES INDOOR CELLULAR SIGNAL COVERAGE UP TO 12,000 SQ FT; DECREASES DROPPED OR MISSED CALLS; EXTENDS PHONE BATTERY LIFE (USES LESS POWER WHEN SIGNAL IS STRONGER); WORKS WITH ALL PHONES & US CARRIERS EXCEPT NEXTEL(R); MAINTAINS NETWORK INTEGRITY USING PATENT-PENDING TECHNOLOGIES; INCLUDES AMPLIFIER BASE UNIT, POWER SUPPLY, HIGH-GAIN SIGNAL & BASE UNIT ANTENNAS, SIGNAL COMBINER & MOUNTING HARDWARE