This Samsung Galaxy Tab 10.1 Keyboard Dock is model # ECR-K14AWEGXAR.  It is pre-owned but in like new condition.  The protective plastic is still attached. Doesn't show any signs of use.  It works with the older tablets with the wide connection (30 pin, please refer to photo of top of unit), not type c or micro a connectors.  The tablet sits on the keyboard. Only comes with items pictured.

Bonus:  It comes with a new/sealed Samsung Connection Kit/Card Reader.  This item states it is compatible with model #s P7300, P7310, P7500, P7510.