A B1 visa can only be acquired abroad. The applicants need to establish the purpose of their trip to be for business activities only. These activities should not involve gainful employment or compensation from any source within the United States.
B1 visa applicants may be required to show that they have sufficient funds to support themselves during their stay. They may also be obliged to meet certain health and character requirements.
Applicants must express their intent to return to their home country at the end of their stay.