This extension cable is designed to increase the distance between the fixture and the low-voltage cable or between the light sensor and the transformer. Important: The maximum distance between the fixture and the cable can be extended by up to 4 meters. You can combine the CBL-EXT CORD 1MTR with the CBL-EXT CORD 3MTR for a total of 4 meters or pair the CBL-EXT CORD 1MTR with the CBL-EXT CORD 2MTR for up to 3 meters of extension.