This range of high quality BNC connectors offers excellent mechanical and electrical performance and simple assembly. Precision machined components give true 75 ohm impedance and excellent return-loss, even at frequencies up to 4.5GHz, making them suitable for 3Gb/s HD-SDI 1080p, SD-SDI and analogue video. A compact variation on the traditional BNC twist-lock connector, mating / un-mating is achieved by twisting the whole connector, rather than just an awkward knurled front coupling nut as on conventional styles.