Sam Fisher- OPSAT Frequency Jammer

“Char­lie,” she said, by way of greet­ing, push­ing one of the cups to­ward him as he sat down op­po­site her.

“Anna.” He dropped heav­i­ly into the chair. “Are we, uh, se­cure here?”

Grim placed her OPSAT on the ta­ble and ac­ti­vat­ed a lo­cal­ized fre­quen­cy jammer built into the de­vice. The range was lim­it­ed but enough to en­com­pass their cor­ner of the near-emp­ty lounge. “Se­cure enough,” she told him.

- Firewall, Chapter 11