3g Signal Booster Umts/wcdma Repeater Anytone AT4000 Cell Phone Booster AnyTone AT4000 for 3G - Improves 3G UMTS Signals USE: for HOME & OFFICE up to 100 m2; FREQUENCY: 2100 MHz COMPLETE KIT INCLUDES: booster, indoor/outdoor antennas, cables, mounting - full kit for easy installation without special help of tecnichal specialist. GUARANTEES: 2-Year warranty, 30 Days moneyback guarantee, ISO, CE, RoSH Certification, Worldwide delivery from EU, Express Delivery The repeater works with two antennas (included in the kit). One is the indoor antenna which communicates with your cell phone or laptop data card, and another one is the outdoor antenna which communicates with the cell tower. After you connect the booster to a socket base, the signal of the covered zone will get improved in 5-7 seconds.