Wilson 3-Watt Wireless Cellular Amplifier Kit with In-Car Antenna Multi-User Improvement - Provides Enhanced Cellular Signal for Multiple Cellular Users Or Devices Within the Vehicle^Works with All Cellular Phones & All Us-Based Carriers Except Iden/Nextel^Greatly Reduces Dropped Calls & Extends Phone'S Battery Life^ Multi-User Improvement - Provides Enhanced Cellular Signal for Multiple Cellular Users Or Devices Within the Vehicle Works with All Cellular Phones & All Us-Based Carriers Except Iden/Nextel Greatly Reduces Dropped Calls & Extends Phone'S Battery Life Delivers up to 10 times more power than standard cell phones or cellular-based data cards to multiple users simultaneously Includes low-profile interior antenna