This power adapter is intended to be used with the Arizer V tower or the Arizer Extreme Q. This is an authentic Arizer equipment, and is exactly the same as the one that originally comes with the purchase of either of these models. If you own both the Arizer V Tower and the Arizer Extreme Q, and you have broken or lost your power adapter, this product is the one that you are looking for. Having a spare is also good if you ever want to use your vaporizer in different locations. Each product comes with 1 power adapter with power cord.