?Connector type?RF (Radio Frequency) coaxial connector, SMA male plug (pin) to BNC female jack (hole) low loss coaxial adapters?Matiarial?Copper with Great connectivity (Not Alloy). Surface treatment: Gold-plated?Performance?Impedance: 50 ohm, Low-loss ; >1000 Times Mating Life Time. Handy items when changing types of connectors during installations?Application?These sdi couplers are used in conjunction with an assortment of CCTV camera installations, security alarm systems, sdi monitors, DVR Recorder, Image Audio Transmitter Receiver, and surveillance audio cables.?Package included]?2 pieces of BNC Female to SMA Male Adapter ABONIX BNC Female to SMA Male Coax Connector (Pack of 2)