The document discusses how to set the DMX512 address for manual LED lighting fixtures using a DMX512 address writer. It provides the following instructions: 1. Connect the address writer to power and press the "MENU" button to select the type of fixture, either "CH-3" for RGB LED fixtures or "CH-4" for RGBW LED fixtures. 2. Press and hold "MENU" for 2 seconds, then release to enter address setting mode. Use the "+" and "-" buttons to select the desired starting address between 1-512. 3. The address will be written to the fixture after 3 seconds and is confirmed by the address writer display returning to the starting menu. The fixture