zBoost YX027-PCS-CEL Dual Band Directional Indoor Wall-Mount Antenna with TNC Male Connector, (6 dBi CEL, 9 dBi PCS) Increases Cellular Phone Signal Strength Indoors Increases Cellular Phone Signal Strength Indoors Wireless Extenders Yx027-Dpc/Pcs-Cel Directional Indoor Base Unit Antenna Directional antenna replaces omni-directional antenna Provides stronger indoor signal for the YX510