Please Note: This is a new DC transformer. These should not be used to replace your AC black transformers (part 46038) as it is incompatible with the old AC parts. Please check your manual if you’re unsure of your setup, or call us for advice.Oase biOrb Replacement Transformer can be used when your existing transformer has stopped working.The Transformer works with the new DC powered BiOrb units (will not work with older accessories. See specs for details)Though the Transformers on the biOrbs are reliable and rarely need replacing, a time may come when a new one is needed.The Transformer has 2 sockets to plug your biOrb air pump and LED lights into. 3 different plug adaptors are provided allowing for use around the world.If you suspect your transformer is not working it is advised that you check the bulbs of the light units to see if they have stopped working.Suitable for all biOrb Aquariums and accessories that use DC power.