🔊 Audio Surveillance / Listening Devices 🎥 Visual Surveillance / Watching Devices 📡 Tracking and Transmission Devices 🕵️‍♂️ Colloquial / Fictional / Espionage-Inspired Terms 🧳 Everyday Objects Often Used as Concealment (Contextual Terms) These aren’t device names per se, but frequently used to hide ‘bugs’ and referred to often as ‘trojan’ devices or concealments: