This is an original Microsoft 48w charger, model 1536 and is identical to the picture shown, this model has the magnetic connector to charge your 48w tablet as well as a USB 2.0 port, that you can charge a whole host of different USB accessories you may own and with 48w of power this Microsoft 48w power supply can easily charge both devices.
 
Genuine Microsoft 48w power supply charger specification:
Power output: 12v 3.6a
Power input 100-240v
Connector type: Magnetic 5 point connector
USB 2.0 connection: Yes 1x USB 2.0 port
USB Output: 5v 1a
Total power: 48w
Contents: Microsoft 48w charger & standard mains lead power cable.
Microsoft model: 1536
P/n: Ktl su10528 12043

• Key points of the Genuine Microsoft 48w power supply
• Fits Microsoft Surface, Surface RT and Surface 2
• Also Fits Surface Pro and Surface Pro 2
• Free Mains power cable cord
• UK supplier with Uk stock
• USB 2.0 also on charging unit
• Original 48w Surface charger

A standard mains cable power lead cord is included with your Microsoft Surface power adapter, so you can charge your Surface tablet straight away. If you order from outside the UK we will send your countries correct power cord.