Easy to connect: The green glue sticks are marked with "+ -" positive and negative poles for easy connection. Easy to connect: The connectors have a screw fixing, so it is not necessary to weld any component. Simply insert the cables and tighten the screw to fix the connection. The anti-slip screw is used at the end, a good contact after tightening it and the wiring will not fall. BNC connector: BNC male connector of superior engineering grade, national standard BNC female connector specification. The insulating plastic connector adopts a new ecological and fire-resistant, soft-looking material. Uses: It is applied flexibly to the BNC output input connections for security, monitoring equipment, converters, etc. Note: Take into account the polarity shown on the adapter when inserting the cables., Manufacturer: Sonew