(1)ceiling antenna multi-band features: a. gsm dual band (890 960MHz,1710 1880MHz) ;umts (1920 2170Mhz). cdma dual band (824 896MHz,1880 1920MHz) ; wifi (2400 2500MHz). wimax (2300 2500MHz) b.apply to IEEE802.11b/g c.good appearance make it decoration as well as hidden wireless antenna. d.people will not fear the radiation of wireless equipment since they can not realize that is a signal radiator. (2)Detail product description: ELECTRICAL SPECIFICATIONS Frequency Range824 960MHz & 1710 2500MHzImpedance50ΩVSWR≤1.5Gain3 dBiCable Length30cmPolarizationVerticalBeam Width55 degreeMaximum Input Power50WConnector BottomN-male or N-Female or as perMECHANICAL SPECIFICATIONSDimensionsΦ188x98mmWeightNet:300g ; Gross:380g.Radome MaterialABS