Utilize a powerful antenna such as the Cellphone-Mate Outdoor Yagi Antenna, CM230-800 for high performance signal gains. The Yagi 800-900 MHz Antenna is a Directional antenna that collects cell tower signals and sends them through a cable to an amplifier or directly to a cell phone or cellular device card. In laymen terms, it will effectively provide your phone / data cards with signals versus situations where you don't have an antenna at all. Most amplifiers do recommend that you have an antenna fixated outside so you receive the most optimal performance during your conversations. The CM230-800 is of course for the 800 MHz band range (806-894 MHz) and is designed for fixed installations. Usage: CM230-800 focuses signals in one direction so be sure this is used only in buildings or other stationary structures. Find the area outside the building whether it's a window the rooftop, or somewhere where this antenna can pick-up the strongest signal strength from your service provider- then mount it using the provided tools in this package. Check this out: [ VERY USEFUL SIGNAL CALCULATOR ] & [ FAQ A.G. AMPLIFIER'S GUIDE FOR NEWBIES ] Cellphone-Mate Outdoor Yagi Antenna, CM230-800 features Unique broadband, low VSWR (microwave) Wall mount, outdoor use Compact Size, Low Profile Lightweight ABS Radome N-Female Connector with Pigtail Yagi Cm230-800 Applications Outdoor systems GSM/CDMA/3G/WLAN systems 806 ~ 960 MHz Broadband working Yagi CM230-800 Specifications Electrical Parameters CM230-800 Frequency 806-960MHz VSWR <1.5 Input Impedance 50 Gain 14dBi Front to Back Ratio >15dB Vertical Plane 72°F±5°F Horizontal Plane 76°F±5°F Polarization Type Vertical or Horizontal Maximum Input Power 100W Lightning Protection DC ground Connector Type N Female Cable Loss 0.12dB Number of Element 14 Cable 14.96 Inch Weight 1.3LB Length-Without Input Cable 44.2 Inch Rated Wind Velocity 133mile/h Working Temperature -40°F~+140°F Yagi 230-800 Package includes U Bolt (M6 x 60 x 73) Flat Washer 6pcs Split spring washer 6pcs Hex nut 6pcs *Life Time Warranty available with Cellphone-Mate Notes: (Any obstruction can't be in the way of the telecommunication direction. Any metallic rod must be away from antenna more than three feet) Yagi 230-800 MHz Installation Diagram Cellphone-Mate Outdoor Yagi Antenna, CM230-800