Adapter
（重定向自Socket adapter）
![This mains power plug travel adapter allows British plugs to be connected to American or Australian sockets.](/Images/godic/202502/11/Mains_plug_travel_adaptor0850.jpg")
![Adapter zum Ersatz der Elektronenröhre ECH11 durch die ECH81](/Images/godic/202502/11/Roeadap0850.jpg")
![Adapterring zum Anschluss von Nikon-Objektiven an Canon-EOS-Kameras](/Images/godic/202502/11/Nikon_Canon_adapter_ring0850.jpg")
An adapter or adaptor is a device that converts attributes of one electrical device or system to those of an otherwise incompatible device or system. Some modify power or signal attributes, while others merely adapt the physical form of one electrical connector to another.