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U-48S - Stationary Spherical Ultrasonic recording Jammer
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- U-48S
- Free worldwide shipping, shipped within 3 days ( Configure the jammer ), delivered within 12 days
- 1 year warranty
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No Hidden Fees – What You See Is What You Pay
Under current U.S. tariff policies, there are no extra charges added to your order for this product—unless specifically noted otherwise for certain Large desktop signal Jammers. The price you see already includes all taxes and fees, so you can shop with confidence.
Frequency and power plug are configured according to your regional standards.
The U-48S is a professional ultrasonic voice recorder jammer designed to protect confidential conversations in conference rooms, meeting spaces, and negotiation areas. It effectively prevents unauthorized audio recording by disrupting digital microphones used in voice recorders, smartphones, and other recording devices.
Thanks to its discreet spherical housing, covered with a special acoustic fabric, the device visually resembles a modern pendant light. This allows it to blend seamlessly into office interiors without attracting attention. For maximum effectiveness, the unit is designed for ceiling installation at the center of the room.
Key Features & Benefits
Reliable protection against audio recording
The U-48S blocks voice recording by generating ultrasonic interference that renders captured audio unusable. Speech recorded within the protected area is reduced to uniform noise, with no intelligible content.
360° ultrasonic coverage
Equipped with 48 built-in ultrasonic emitters arranged in a circular configuration, the device delivers full 360-degree coverage. This ensures consistent protection regardless of where a recording device is placed in the room.
Advanced ultrasonic jamming technology
The system operates by emitting ultrasonic waves that interfere with microphone membranes. While completely inaudible to the human ear, these waves create strong acoustic distortion for microphones, making clear voice recording impossible.
Discreet ceiling-mounted design
Designed to resemble a suspended ceiling lamp, the U-48S provides effective protection without compromising the visual aesthetics of professional environments.
Convenient operation
Wireless remote control for easy activation and adjustment
Built-in power supply for direct connection to the mains—no external adapters required
Ideal Applications
Conference rooms
Boardrooms
Negotiation and meeting rooms
Corporate offices and secure facilities
Technical specifications:
Coverage: 360° room coverage
Effective range: up to 5.1 m
Emitters: 48 ultrasonic emitters (circular array)
Control: Wireless remote control included
Remote range: up to 30 m (line of sight)
Installation: Ceiling-mounted (center of room)
Spherical housing, pendant-light style
Mounting: hook / suspension ring
Power: Built-in power supply, direct mains connection
Input: 110V AC
Cable length: 1 m
Dimensions & Weight: Ø160 mm; 800 g
Operating environment: Indoor use only
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