The voltage mismatch may cause your fairy lights to blink instead of operating properly. Please verify the connection type and output voltage of your fairy lights—this plug is compatible only with 2-pin 24V fairy lights, as shown in the product image. Other types are not compatible. High Quality & Wide Applications: Made from high-toughness ABS material for impact resistance and effective heat prevention. Input: 220–240V, 50–60Hz; Output: 24V; Rated Power: 6W. IP44 waterproof rating, suitable for low-voltage lighting such as Christmas tree lights, icicle lights, net lights, and curtain lights. Timer Function & Memory Function: Press the switch twice quickly to enable or disable the timer. When enabled, the indicator light turns green (6 hours on / 18 hours off). When disabled, the indicator light turns off. The memory function retains the last selected mode without requiring reconfiguration. 8 Light Modes: This 24V transformer plug offers 8 lighting effects: steady on, combination, waves, sequential, slow glow, chasing flash, slow fade, and twinkle flash. Modes can be changed using the button on the plug. Waterproof & Safety: IP44-rated for protection against splashing water. Recommended for indoor use. Built-in overvoltage protection, overcurrent protection, and short-circuit protection ensure safe and stable operation.