Equal amounts of signal sent to two antennas for similarly sized areas</br>Each output port loses 3 dB</br>800-900 MHz & 1850-1990 MHz bands (Cellular?? iDEN & PCS)</br>N-Female Connectors</br>Can connect two outside antennas to one Dual-Band amplifier or two amplifiers to one inside antenna (sold separately)</br></br>Product Description</br></br>Dual Band Diplexer/Combiner (800-900 MHz/1850-1990 MHz Bands)</br><br/>http://www.amazon.com/gp/product/B0018PXRDS