This power plant has A Standard USB-2.0 output as well so you can also charge micro-USB devices. for example you can plug your Samsung galaxy S3'S micro USB cable into This port to charge your phone, this also allows you to charge one device using the iPhone port and use the USB-2.0 jack for a 2nd device, charge 2 devices at once.

• 5200mAh for plenty of charging power
• Built-in Flex Arm for charging on the go
• Micro USB and Universal USB Socket for charging any USB device
• Rapid charge or charging 2 devices simultaneously
• LED Battery level Indicator lights
• Automatic shut-off
• Brand : TYLT
• Compatible with : Samsung Galaxy S3
• Color : Black
• Battery Cell : Lithium Ion
• Output Voltage : 4.75V-5.25V
• Output Current : 2.1 Amps
• Battery Charge Time : 6 to 7 hours
• Dimensions : 78 x 44 x 33 mm
• Weight : 5.4 oz