The 4 pin aviation connector is commonly used on reversing cameras and MDVR's (mobile DVR and CCTV). These adaptors are sometimes referred to as "gender changers" because they essentially change the gender of the plug. This one will turn a male connector in to a female connector. Having said that, there are instances where this cable is just being used to connect an output eg from an MDVR to an input eg a monitor/display.
Our current stock is somewhere between 20-40cm, as we have had a couple of batches with different lengths. If you need a specific length, please message before ordering so that we can check if we have that.
This cable can be used externally, and is made by a good quality cable factory, who use pure copper for the cables, shielded pure copper screening, and aluminium foil to cover the whole cable.