Vocera Communications has raised another $7 million for its wearable Wireless communications badges, which let workers talk over distances via WiFi networks, VentureWire reports today (sub required).

The Cupertino company’s technology allows workers to press a button on a small badge, and ask for someone and the system recognizes who or what the worker is asking for, and makes the connection.

The company said it achieved a valuation above $100 million after the investment, and that the company will stay in the red as it seeks to expand into other markets outside of the medical industry.

Granite Global Ventures led the inside round and increased its stake in the company, said [CFO Martin Silver]. Existing shareholders Thomas Weisel Venture Partners, RRE Ventures, Venrock Associates, Avalon Ventures and Vanguard Ventures also participated. The latest round brings Vocera’s total financing to more than $47 million.