This 20W 5V 4A Power Supply Adapter is suitable for the general purpost requirements where 5v power supply is  required with current capacity of 4A like mobile DVD, TV box, wireless audio devices, charging equipment, MP3 / MP4 Raspberry pi, small table lamp, routers, switches, game consoles, telephones, lights, cameras, monitoring equipment, controller and other households/portable devices. Especially suitable for ADSL and router!

Specifications of  5V 4A Power Supply AC Adapter Charger:

1. The input voltage: 100 v - 250 - v
2. Output voltage: 5 v
3. Output current: 4 A
4. DC line length: 1.2 m 
5. Universal plug: 5.5 * 2.1 MM

Package Includes:

1 x  20W 5V 4A Power Supply AC Adapter Charger

Note:

  Product Physical Shape my vary from the picture but the same as specifications.