It is essential to have both accurate business knowledge as well as good interpersonal skills. This comes from any point of sales in any aspect, everything from clothing retail to medical device sales. In order to first develop a bond with the customer, the interpersonal skills must be present. A sales rep cannot be awkward and standoffish when attempting to make a sale. These interpersonal skills make the customer more comfortable and feel a sense of familiarity when talking to the sales rep. It fosters a relationship that can enhance their decision to seal the deal. However, it takes more than raw charisma to win over most knowledgeable customers. It is essential to understand the technical aspects of the device or sale being made. An inquisitive customer is likely to ask many questions so a sales rep should be well versed in the logistics of what they are selling. Additionally, a customer will be more confident in their decision if you are confident in what you are selling.