5 pin Micro USB A, Micro USB B plug connector
This is the 5 pin Micro USB A, Micro USB B plug connector
The Micro-USB connector was announced by the USB-IF on 4 January 2007. Micro-USB plugs have a similar width to Mini-USB, but approximately half the thickness, enabling their integration into thinner portable devices. The Micro-A connector is 6.85 by 1.8 mm with a maximum overmold boot size of 11.7 by 8.5 mm, while the Micro-B connector is 6.85 by 1.8 mm with a maximum overmold size of 10.6 by 8.5 mm.
The Universal Serial Bus Micro-USB Cables and Connectors Specification details the mechanical characteristics of Micro-A plug (shown on top), Micro-AB receptacle (which accept both Micro-A and Micro-B plug), and Micro-B plug (bottom) and receptacle, along with a standard-A receptacle to Micro-A plug adapter.