This is a 500mm Qwiic Cable With 1mm JST Connector. It’s designed to connect Qwiic enabled components together but can be used for other applications as well.

Each Qwiic Cable’s wires have been color-coded to red, black, blue and yellow.

This cable is used for connecting Qwiic boards that need to be very far away from the controller. Note that I2C signals will degrade over longer distances. We recommend keeping the connections to 1 meter or less. That said, we’ve daisy-chained boards 2 meters (four of these cables) away from a RedBoard successfully. Your mileage may vary.