SEL Ultra is an ultrasonic microphone jammer disguised in ceiling speaker for protection of confidential conversations from unauthorized audio recordings.
Installed directly into a suspended ceiling, it blends into meeting rooms, offices, conference spaces, and executive environments while creating an ultrasonic interference that disrupts microphones and portable audio recorders. Unlike portable tabletop jammers such as the
OMNI TOWER Mini Ultrasonic Microphone Jammer or mobile solutions like the
CASE ULTRA-06 Ultrasonic Jamming Briefcase, the SEL Ultra Speaker is intended for fixed and discreet installation above desks or conference tables, allowing continuous protection without drawing attention to the device itself.
Using a system of high-quality ultrasonic transducers controlled by a microprocessor, the SEL Ultra generates complex ultrasonic signal above the range of human hearing, making recorded speech unintelligeble in recordings. The ultrasonic interference works in the background, so you can still continue on normally with meetings.The jammer operates within an approximate 3 meter range, depending on the recording device and room conditions. For optimal performance, place the unit directly above the conversation area.
The device starts operating immediately once connected to power, while jamming can be controlled remotely using the included RF remote control operating at 433.92 MHz with an approximate range of 20 meters. A single green LED blink indicates that jamming is ON, while a double green LED blink indicates that jamming is OFF.
It helps reduce the risk of information leakage during sensitive discussions, negotiations, internal meetings, and executive conversations. The system is effective against a wide range of commonly used spy recording devices including:
- Cellphone microphones
- Smartphone voice recorder apps
- Digital dictaphones and portable audio recorders
- Radio microphones
- Cameras with built-in microphones
- Hidden microphones and covert recording devices
- Professional voice recorders with internal or external microphones
The SEL Ultra is suitable for:
- Conference rooms
- Executive offices
- Negotiation rooms
- Legal and consulting offices
- Private meeting areas
- Corporate boardrooms
- Secure indoor conversations
SEL Ultra Main Features:
- Ultrasonic microphone jammer integrated into a ceiling speaker housing
- Designed for offices, conference rooms, and meeting spaces
- Approximate effective jamming range of 3 meters
- Microprocessor-controlled ultrasonic transducers
- Silent operation
- Wireless remote control for ON/OFF operation
- Ceiling-mounted discreet installation
- Omnidirectional 120° horizontal coverage
- Simple installation and operation
- Continuous operation up to 4–5 hours
- Suitable for protecting confidential discussions and sensitive meetings
SEL Ultra Speaker Full Specifications:
Max range: depending on the microphone: ~3 meters
Directionality: Horizontal plane 120°
Power supply: Power adapter 15 V / 110 – 230 V
Maximum continuous operating time: 4-5 hours, break time 30 minutes
Remote control: Switching on/off, the range ~ 20 meters
Wireless remote control: Work frequency 433.92 MHz in the ISM band
Mounting hole diameter: 190 mm, mounting template included
Operating temperature: 0°…+40 °C (32-104 Fahrenheit)
Set includes: Jammer, power adapter, remote control (2pcs)
Ceiling Conversation Protector Feature Focus:
Discreet Ceiling Installation
The system is built into a ceiling speaker-style housing, allowing it to blend naturally into offices, conference rooms, and meeting spaces. Once installed in a suspended ceiling, the device remains discreet while helping protect private conversations without drawing attention.
Ultrasonic Microphone Jamming
The jammer uses high-quality ultrasonic transducers controlled by a microprocessor to generate ultrasonic interference above the range of human hearing. This interference disrupts microphones in smartphones, voice recorders, hidden microphones, and other recording devices, making recorded conversations difficult to understand.
Silent Background Operation
Unlike noise generators that produce audible sounds, the SEL Ultra works silently in the background. Meetings, negotiations, and conversations can continue normally while the device helps protect sensitive information from unauthorized recordings.
Approximate 3 Meter Protection Range
The SEL Ultra provides an approximate effective jamming range of up to 3 meters, depending on the recording device and room conditions. For best results, the device should be installed directly above the protected conversation area.
Simple Remote Control Operation
The jammer starts working immediately once connected to power and can be controlled using the included wireless RF remote control. Users can easily switch jamming ON or OFF from up to approximately 20 meters away, while LED indicators show the current operating status.
SEL Ultra Ceiling Jammer FAQs:
What is the SEL Ultra used for?
The SEL Ultra is an ultrasonic microphone jammer designed to help protect confidential conversations from unauthorized audio recordings in offices, conference rooms, meeting spaces, and other indoor environments.
How does the SEL Ultra microphone jammer work?
The device generates ultrasonic interference above the range of human hearing using microprocessor-controlled ultrasonic transducers. This interference disrupts microphones and recording devices, making recorded speech difficult or impossible to understand during playback.
Can people still talk normally while the jammer is operating?
Yes. The SEL Ultra operates silently without producing loud white noise or audible disturbance, allowing meetings and conversations to continue normally while the ultrasonic interference works in the background.
What types of recording devices can the SEL Ultra affect?
The system is designed to interfere with: smartphone microphones, voice recorder apps, digital dictaphones, portable audio recorders, radio microphones, hidden microphones, cameras with built-in microphones, professional audio recorders.
What is the effective operating range of the jammer?
The approximate effective jamming range is around 3 meters, depending on the recording device, room acoustics, and installation position.
Where should the SEL Ultra be installed?
For best performance, the unit should be mounted in a suspended ceiling directly above the conversation or meeting area, such as above a conference table or desk.
Is the SEL Ultra visible after installation?
The device is designed to blend into standard ceiling environments using a speaker-style housing, making it discreet and suitable for professional office interiors.
How is the jammer controlled?
The SEL Ultra can be switched ON or OFF using the included wireless RF remote control operating at 433.92 MHz, with an approximate operating range of 20 meters.
How do I know if the jammer is active?
The device uses LED status indications:
Single green LED blink = jamming ON
Double green LED blink = jamming OFF
What is included in the package?
The package includes: SEL Ultra ultrasonic microphone jammer, 15V power supply, 2× RF remote controls.
Note:
For detailed info on the specifications and use of the device, please read the PDF available for download below.
24 Months Warranty
>>Download detailed specifications (PDF)<<
Order until 13:00 CET and we will ship today! One-day delivery across EU and UK
.webp "Maximum Protection Range: 0.5 - 4 meters (depending on the type of recording device)<br>Power Supply: Built-in Li-ion battery / external power supply (5V / 110-230V)<br>Battery Life: 4-5 hours of continuous operation<br>Recommended Operating Time: 4-5 hours, with a 30-minute break<br>Remote Control: Wireless activation with a 20-meter range (433.92 MHz ISM band)<br>")
