Valencell, a Raleigh company that makes earbud sensors that allow wearers to monitor their health while listening to music, has raised $5.5 million in venture capital funding.

The investment round was led by Best Buy Capital, the investment arm of retailer Best Buy, and also included TDF and True Ventures.

Valencell said it will use the money to expand its team, increase licensing agreements and expand the capabilities of its products. The company has six employees.