Anker Wireless Charging Station for Apple Products

Can't use when you get it and doesn't provide a way to plug it in nor what to buy to do so within the package or on their Amazon store page for the item nor in the basic Amazon description! I liked that it was for travel and white and slim. It does live up to that. However, there is a little "manual" that explains that for an iPhone you need a 9V=3A or a 12V=2A system that delivers 7.5W. I spent a long time trying to find a 7.5W output power adapter and only after perusing many comments and others complaining did I find that Anker recommends you utilize their 18W power adapter. Okay...then why have the manual stating 7.5W? Other comments recommended the 20W power adapter. Both stating told by Anker directly after calling. These power adapters are $9-$28 depending on what you get. I am wholly confused and frustrated and can't use this charger at all and now have to drive to UPS to return it. Other Anker portable chargers and products have served me well and that is why I bought this, even though it didn't come with the watch charging cable either. That's another $13-20 you have to put out and make sure you order the right size that will fit into this Anker product dock as there are many Apple watch chargers, versions and sizes out there. Anker did state it did not come with the Apple watch charger on their description, however; a bit more help in finding out which watch charger works with THIS charging station would have been helpful. Just wasted an hour of my life and useless and now have to deal with returning. DO NOT BUY THIS PRODUCT