This is the iBeam TE-RT4P 4 Pin Female DIN to Feale RCA Connector.

This adapter cable features a female 4-Pin Din connector on one end and a standard male RCA plug-in on the opposite end, allowing RCA cameras to be used with a commercial monitor. Connects audio, video, and power for RCA cameras to your display. Generous 3.28 feet (1 meter) of cable length to accommodate larger vehicle applications.

Specifications:
Converts RCA to 4-Pin Din cable
Allows RCA camera to be used with commercial monitors
3.28 feet (1 meter) in length