How thin is the cardboard unit?

The corrugated sheet is approximately 4.5–5.0 mm thick, enabling unobtrusive placement in packaging and flat surfaces.

Which receivers can monitor the transmission?

Monitoring can be performed with scanning receivers operating in WFM mode and with specialised SET-1 receivers where available.

MGT 032–038 “Cardboard” — Covert Analogue Audio Transmitter

Q: Who can buy this system?

Supply is limited to qualified government, defence, and law-enforcement customers or accredited partners. Local regulations apply.

An analogue UHF micro-transmitter is discreetly concealed within a corrugated cardboard sheet for seamless audio monitoring. The sheet is approximately 4.5–5.0 mm thick, with the transmitter, antenna, microphone and lithium power cells integrated into the board to avoid visual cues. Operation uses a crystal-controlled, WFM radio channel for predictable performance.

The platform is configurable to mission preferences (frequency, output power and autonomy profiles). Reception can be achieved using scanning receivers in WFM and with specialised SET-1 receivers where available.

Main features

Invisible concealment in common corrugated media.
Optimised microphone for intelligible voice capture.
Battery flexibility: multiple lithium coin-cell configurations to tune autonomy.
Extended battery life across model range (up to 36 days).
Quartz stabilisation for stable RF behaviour.

MGT 032–038 Cardboard covert analogue transmitter built into a corrugated sheet

Models & autonomy

MGT 032 — continuous operation: 12 days; dimensions: 140×100×4 mm.
MGT 033 — continuous operation: 1 month; dimensions: 200×150×4 mm.
MGT 034 — continuous operation: 2 months; dimensions: 210×210×4 mm.
MGT 035 — continuous operation: 3 months; dimensions: 290×210×4 mm.
MGT 036 — continuous operation: 12 days; dimensions: 200×150×4 mm.
MGT 037 — continuous operation: 24 days; dimensions: 210×210×4 mm.
MGT 038 — continuous operation: 36 days; dimensions: 290×210×4 mm.

Technical overview

General

Technical specifications for the MGT 032–038 Cardboard series
Frequency	416.5 – 423.5 MHz
Frequency control	Crystal (quartz)
Modulation	WFM
Power supply	Button-cell lithium batteries (2.5 – 3.2 V)
Output power	~5 mW
Current drain	7 mA (models 032, 036, 037, 038)

Procurement, compliance & support

Availability is restricted to qualified government, defence and law-enforcement customers or accredited partners. End-use and export controls apply; always observe local spectrum regulations. We provide confidential integration, operator training and lifecycle support.