Eavesdropping GSM transmitter PRO

Eavesdropping GSM transmitter PRO
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- Experienced customer service and 2 year warranty
- Specialist since 2007. Member of Thuiswinkel Waarborg

Specifications: Eavesdropping GSM transmitter PRO
Conformity | CE |
---|---|
Best for: | Eavesdropping rooms |
Alarm notification | Call |
Sound detection | Yes |
Microphone | Yes |
Microphone sensitivity | 10 - 15 Mtr |
Voice filter | Yes |
Battery | Yes |
Battery type | Li-ion recharchable |
Battery working time | 1 - 2 days |
Battery life standby | 4 - 8 weeks |
Recording function | No |
Adapter voltage | 5 volt |
Length cm | 52 |
Height cm | 16 |
Wide cm | 32 |
SKU | 7851 |
Pros and cons :
- External microphone with ±1 meter cable for targeted placement
- Sound detection with automatic call to your phone
- Up to 70 days standby time, approximately 25 hours of listening time
- Works worldwide via mobile network (2G/3G/4G)
- Compact and easy to hide
- Not suitable for long-term use on mains power
- No recording function without external telephone recorder
- Not waterproof – suitable for dry areas only
The GSM transmitter PRO+ is a professional monitoring solution with a high-quality external Knowles microphone that is mounted outside the housing via an extended cable (approximately 1 meter). This allows you to discreetly conceal the transmitter while positioning the microphone directly in the room to be monitored. The transmitter offers live remote monitoring and can also automatically trigger a call upon detection of noise.
User-friendly and immediately ready for use
Simply insert a working SIM card into the GSM transmitter, turn the device on, and call the SIM card's number. The call is automatically recorded without an audible click, allowing you to listen in discreetly. Thanks to the combination of a standby battery life of up to 70 days and a listening time of approximately 25 hours, the transmitter is suitable for extended use. Connecting it to the mains is possible for continuous use, but not recommended for long-term use due to battery wear.
Installation in 2 steps:
1. Insert a SIM card into the transmitter
2. Call the SIM card number to listen live

Sound detection with automatic call
The transmitter can be set to automatically call you when sound is detected in the room. This allows you to be notified only at important moments, without having to constantly listen in. Of course, you can also dial in manually in this mode to listen in.
Knowles High Range External Microphone
The included Knowles microphone is external and connected to the transmitter via a thin extension cable. This allows you to position the microphone up to approximately 1 meter from the transmitter, ensuring optimal placement in the room and excellent sound quality from several meters away.
Key features of this GSM transmitter:
– External Knowles microphone with ±1 meter cable
– Standby time up to 70 days, up to 25 hours of listening time
– Works worldwide via mobile connection (2G/3G/4G)
– Automatic call notification upon sound detection possible
– Compact size, easy to hide
Mounting with supplied 3M tape
The PRO+ GSM transmitter comes with two pieces of 3M double-sided tape. This allows you to securely and discreetly attach the transmitter to walls, furniture, or other surfaces. Please note: this product is not waterproof and is only suitable for dry indoor environments.
Optional recording with our telephone recorder
If you want to make audio recordings while listening in, we recommend the optional Sitcon telephone recorder (item number SKU 7004). This allows you to record conversations directly through your phone for later use or as evidence.
Package contents:
- GSM transmitter PRO+ with external microphone (±1 meter cable)
- Charger with USB cable
- 3M mounting tape
- Dutch manual
NB: This device is intended for legal applications. Please check before use whether it is permitted in your situation. Sitcon accepts no liability for incorrect or unlawful use of this product.
Buy a GSM transmitter at Sitcon
Since 2007, Sitcon has specialized in eavesdropping solutions and other surveillance equipment for both private and professional use. All our products are extensively tested by our own technical department. You can visit one of our stores in the Netherlands or Belgium for advice and a demonstration. Prefer to order online? We ensure fast and discreet delivery.
Frequently asked questions about this GSM transmitter PRO+
How does this GSM transmitter work?
You insert a working SIM card into the device and call the number. The transmitter automatically answers the call and immediately activates the microphone for live listening.
What is the difference with standard models?
This PRO+ version includes an external microphone with a ±1 meter extension cable for more targeted placement and better performance in difficult spaces.
Can the device automatically call on sound?
Yes, you can enable sound detection so that the transmitter will automatically call your phone number when sound is detected.
Can this system be used wirelessly?
Yes, the device has an internal battery and is completely wireless. Charging is via USB. Mains operation is possible, but not recommended for long-term use.
Is this device easy to hide?
Yes, due to its compact size and external microphone, you can place the transmitter itself out of sight while the microphone hangs discreetly in the room.
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