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GSM Quad-Band Spy Transmitter — Unlimited-Distance live Listening

Name: NANO-BUG GSM Quad-Band Spy Transmitter
Brand: Endoacustica Europe
SKU: NANO-BUG
Rating: 4.8 (9 reviews)

Live listening via GSM call (quad-band)
VOX/motion alarms with auto-callback
Remote programming by SMS
DSP audio with noise reduction
Ultra-compact 31×31×10 mm

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Prod. code: NANO-BUG

What NANO-BUG Does

Unlimited-distance live listening via GSM call, VOX/motion alarms with auto-callback/SMS, and remote SMS setup & status.

Who It’s For

Licensed PIs, law enforcement, corporate security and audit teams, and families/caregivers where permitted by law.

Why It’s Reliable

Quad-band GSM coverage, DSP-processed audio, whitelist access (up to 5 numbers), and optional 12 V/220 V continuous power.

Unlimited-distance listening via GSM

NANO-BUG is an ultra-compact GSM quad-band listening device (31×31×10 mm) designed for vehicles and indoor environments. Insert a SIM card (PIN disabled), place the unit and call its number to listen live in hands-free mode from anywhere with GSM coverage. A dedicated DSP optimizes voice pickup, reducing hiss and background noise for clear intelligibility.

VOX & motion alarms with callback/SMS

The device supports voice-activation (VOX) and motion alarms. When the selected threshold is exceeded, it can auto-call a programmed number and/or send an SMS alert. Sensitivity can be set on multiple levels to suit the scene (vehicle, office, warehouse).

Remote programming by SMS

Configuration is performed with simple SMS commands (add/remove numbers, set VOX/MOV, thresholds, enable/disable callback, query status). You can program a whitelist of up to 5 authorized numbers so only trusted callers can activate listening or change settings.

Power & autonomy

The internal rechargeable battery enables quick, discreet installations even in constrained spaces. For long-term use, continuous power is available through optional 12 V (vehicle) and 220 V (mains) interfaces.

Legal notice
Use only for lawful purposes and in compliance with applicable regulations; where required, obtain prior consent from the parties involved.

Radio network: GSM quad-band 850/900/1800/1900 MHz

Audio path: Low-power DSP with noise reduction and AGC for voice clarity

Microphone: High-sensitivity omni, optimized for voice band

Triggers: VOX (voice) and MOV (motion)

Callbacks/alerts: Auto-callback and/or SMS on trigger

Thresholds: Multi-level sensitivity selection

Access control: Whitelist of up to 5 authorized numbers

Remote management: SMS commands (setup, status, alarms)

SIM: Standard GSM SIM (PIN disabled). Voice/SMS plan recommended

Dimensions: 31 × 31 × 10 mm

Power: Internal rechargeable battery; optional 12 V (vehicle) / 220 V (mains) kits

Installation: Rapid, highly concealable; vehicle or indoor

Operating mode: Live listening by incoming call; no app required

Notes: performance depends on GSM coverage, placement and local acoustic conditions.

In-Field Use

Vehicle deployments
Discreet fit using the internal rechargeable battery or an optional 12 V feed. VOX/motion triggers can place an auto-callback and/or send SMS alerts when activity is detected—ideal for service fleets and mobile teams.
Rooms/offices without internet
Live listening via a simple GSM call; no app or Wi-Fi required. Works wherever there is mobile coverage. The onboard DSP improves speech intelligibility in challenging acoustics.
Rapid covert setups
Ultra-compact format (31×31×10 mm) enables fast, low-profile placement. Multi-level VOX sensitivity focuses alerts on relevant events and limits nuisance callbacks.

Internal audits & compliance
Access is restricted via a whitelist (up to 5 numbers). SMS commands handle configuration, threshold tuning, and status checks directly in the field.
Caregiving & family safety (where lawful)
With explicit consent and full respect of local laws, VOX/motion alerts and callbacks support targeted supervision scenarios at home or in assisted environments.
Technical checks & fallback channel
When data links are unreliable or disallowed, the GSM voice path provides a robust backup for operational audio checks; optional 220 V kits support continuous uptime.

Use is allowed only for lawful purposes and in compliance with applicable regulations; where required, always obtain consent from the parties involved.

NANO-BUG Frequently Asked Questions

Does it require data, or just voice/SMS?

Only voice/SMS are required. Insert a SIM with PIN disabled; calls provide live listening, and SMS handle configuration/alerts.

How many numbers can I authorize?

You can define a whitelist of up to 5 authorized numbers for listening and remote configuration.

How do VOX/motion alarms and callback work?

When the selected voice or motion threshold is exceeded, the unit auto-calls the programmed number and/or sends an SMS. Thresholds are adjustable by SMS.

Does it record audio?

NANO-BUG is a live listening device over GSM. For local recording, consider pairing with a dedicated micro voice recorder (see “Related Products”).

What about battery life and continuous power?

The integrated rechargeable battery supports rapid deployments; for 24/7 operation use the optional 12 V or 220 V kits.