Introduction: The booster kit includes an booster, an indoor antenna and an outdoor antenna, the outdoor antenna can pick up good mobile signal from the outside of signal tower , and send the signal through coaxial cable to the booster, the booster can amplify the signal, then the amplified signal is sent to the indoor antenna, the indoor antenna can transmit the signal into your car , so you can enjoy clearer phone call or faster mobile date inside your car . Feature: Frequency range : Downlink 728--746MHz, 698--716MHz Max output power : 27dBm Power Gain : 45dB-55dB I/O Port : FME Male on both ends Package: 1. 1 * Cell signal booster for car 2. 1 * Power Adapter 3.1 * Inside patch mounted antenna 4.1 * Outside magnetic mounted antenna 5. 1 * English User Manual The cell phone signal booster antenna kit reduces dropped calls and improves the voice quality in your car or boat by boosting your signal strength. This repeater kit is suitable for car truck/boat. The installation requires no technical experience with easy plug-and-play style setup Note: 1.The cell phone signal booster antenna kit would work for Band 12 (AT&T T-Mobile 700MHz),please kindly confirm the network frequency before order. 2.Make sure that you can make calls outside your car,If there is no signal outside your car,the booster will not work for you.