12VDC 500ma AC Power Supply Transformer Charger
This is an AC power supply. It is used to power any number of things.
It plugs into a standard 110V wall outlet. It outputs 12 VDC 500ma (.5amp).
The connection size is 2.1mm inner diameter and 5.5mm outer diameter. There are many different size of jacks on products. While this is a very common one, there are others so please make sure your device will fit this power supply prior to ordering.