Beta Testing is done in the Clients place and the testing will be conducted by the Clients

beta testing is the testing of the application after it is released to the client when it is being deploy on live enviroment and when it is being use by real time user.

Beta testing :- testing when development and testing are essentially completed and final bugs and problems need to be found before final release. Typically done by end-users or others, not by programmers or testers.