This is an original Microsoft 12v 3.6a charger, model 1536 and is identical to the picture shown, this model has the magnetic connector to charge your 12v 3.6a 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 12v 3.6a of power this Microsoft 1536 power supply can easily charge both devices.
 
Genuine Microsoft 12v 3.6a 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 1536 charger & standard mains lead power cable.
Microsoft model: 1536
P/n: Ktl su10528 12043
 
Key points of the Genuine Microsoft 1536 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 12v 3.6a 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.

Also fits the Microsoft surface pro, known as as the first Pro or Pro 1