Boost GSM W-CDMA 850mhz cell signal to make call and send txt??works with most US network providers.</br>Coverage up to 2100sqft??supports 50 simultaneous users??No more dropped calls.</br>Simple and easy to install?? easy-to-open packaging??ship from US warehouse or China by UPS DHL EMS</br>Guarantee: 30 Days Customers Satisfaction??Three months Free Replacement??1 Years Manufacturer Warranty</br>FCC authentication certificated / Frequency range: 824 ~ 849MHz?? 869 ~ 894MHz</br></br>Product Description</br></br>Introduction:<br /> The booster kit includes an booster?? an indoor antenna and an outdoor antenna?? the outdoor antenna can pick up good mobile signal from outside of your house?? 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 house?? so you can enjoy clearer phone call or faster mobile date insid