Aviation connector is 4-pin M12 male and female connector red DC connector is 5.5 * 2.1MM connector yellow AV connector is video connector. PVC environmentally friendly material high abrasion resistance good flexibility one-piece injection moulding sturdy and durable. Pure copper core conductor fast transmission speed greatly reduce EMI/RFI interference. Nickel-plated plug plug and play to ensure accurate signal transmission. Widely used for connecting surveillance cameras CCTV audio and video signals support rear view cameras monitors suitable for most of the devices that use 4-pin connection.