Designed for larger rooms.
Built for longer tables.
Extended Acoustic Protection System
GT LONG emits an inaudible, randomly modulated signal that keeps recordings unintelligible across a full conference table — engineered for boardrooms, not just the seats nearest the unit.
360°
Omnidirectional, extended range
Dual-mode
AUDIO + PIEZO emission
Remote
Radio remote control
Direct hardware sale is pending Indonesian import and distribution licensing. Today the unit is available deployed within a Zentara engagement — or request a demonstration and we'll notify you when direct purchase opens.
What it protects against
Every recorder at the table.
Long tables put devices metres from the speaker — well beyond a tabletop unit's reach. GT LONG is built for exactly that distance.
- Mobile phone microphones
- Laptops & tablets
- Hidden audio recorders
- Covert listening devices
- Conference-room recording systems
Why GT LONG
Reach a standard unit can't.
A floor-standing tower with a larger transducer array — the same inaudible protection, extended to cover the whole room.
- Extended coverage compared to standard units
- 360° omnidirectional protection
- Ideal for long conference tables
- Executive-ready floor-standing design
- Maintenance-free operation
How it works
Two independent paths of randomly changing white noise.
GT LONG runs two emission modes at once. The first sits in the audible band (AUDIO); the second in the inaudible, near-ultrasound band (PIEZO).
Both signals interfere with microphone pickup, so a recording never resolves into clear speech — while the room stays unobtrusive to the people in it. Protection runs continuously and is set from an integrated radio remote.
AUDIO mode
16–20 kHz · up to 76 dB
PIEZO mode
25.5–26.5 kHz · 117 dB
System specifications
The spec sheet
Dual-mode emission, mains power with battery backup, and remote control.
Frequency range
16–20kHz
25.5–26.5kHz
AUDIO + PIEZO modes
Signal level
76dB
117dB
AUDIO / PIEZO mode
Signal type
White noise
Randomly modulated, two paths
Coverage
360°
Omnidirectional
Power
220 V
12 VDC
Mains (50 Hz) + battery backup
Control
Radio remote
Integrated control system
One family · protect, detect, deny
GT LONG covers the big rooms. The family covers the rest.
Sweep the room, protect the conversation, deny the exfiltration — one hardware family for the full cycle.
Protect the whole room, not just the near seats.
See GT LONG cover a full conference table — a working session with the specialists who deploy it. Direct purchase is opening soon; request a demonstration and we'll keep you first in line.