Selling 10 units as a set without an adapter.

These need 18v 2.5a(2500ma) for the power.

You can get the genuine adapter from ebay or compatible adapters from somewhere else.

This can be used together with 3.5x1.35 mm male jack to 5.5x2.1mm female jack together with 5.5x2.1mm power adapter.

You can charge apple Iphone, samsung galaxy, or any other phones or electronics that support wireless charging.

Also have usb A and usb c outlet for multiple wired charging.