The OKY3276-1 is a relay module made by OKYSTAR, a manufacturer of industrial automation products. It is a 6-channel 24V DC control that supports both normally open and normally closed functions. It has a high isolation voltage of more than 5000Vrms. The module can be used to switch power circuits, control lighting, and perform other on/off applications. The module is rated to handle up to 3A and supports a wide voltage input range of 12-250V. The module also has built-in status LEDs, which indicate relay activation and deactivation.