


Bluetooth Speaker with Anti-Recording Function
The HD333 is a Bluetooth speaker-style anti-recording device that integrates audio playback and recording protection in one compact unit. Its speaker-like design makes it suitable for discreet deployment in offices, meeting rooms, and reception areas.
Equipped with a proprietary ultrasonic mixer and ultrasonic noise-based acoustic interference technology, the HD333 helps interfere with portable recording devices while remaining unobtrusive to the human ear.
- Bluetooth speaker-style appearance
- Anti-recording acoustic interference function
- Local control, mini program control, and remote-control operation
- Designed for offices, negotiation rooms, and reception rooms
Discreet Protection for Private Conversations
HD333 combines audio playback, acoustic anti-recording protection, and flexible control options in a compact speaker-style device.
Effective Recording Protection
Built with a proprietary ultrasonic mixer, the HD333 helps interfere with portable recording devices such as smartphones and voice recorders.
Safe and Imperceptible
Ultrasonic acoustic interference technology provides recording protection while remaining unobtrusive to people nearby.
Discreet Speaker Design
The Bluetooth speaker-style form factor allows the device to blend naturally into everyday office and meeting environments.
Remote and Covert Operation
In addition to onboard controls, the device can be activated through a mini program or the included remote control.
Adjustable Power Levels
Multiple power settings allow users to select a suitable interference level according to different room conditions and use scenarios.
Portable Wireless Use
With Bluetooth 5.0 and a built-in 6600mAh battery, the HD333 supports flexible placement and mobile use.
Speaker-Style Anti-Recording Device
Compact appearance, audio playback capability, and privacy protection functions are integrated into one discreet device.
Speaker-Style Design
Discreet appearance for everyday office and meeting room environments.
Compact Structure
Portable form factor for flexible placement and deployment.
Practical Operation
Supports device-side control and remote operation according to use requirements.
Designed for Sensitive Communication Spaces
The HD333 is suitable for environments where conversation privacy matters and a discreet speaker-style appearance is preferred.
Office
Suitable for internal discussions, management meetings, project communication, and daily office privacy protection.
Negotiation Room
Helps enhance privacy during business negotiations, confidential discussions, and partnership meetings.
Reception Room
Speaker-style appearance makes it suitable for reception rooms and guest areas where discreet deployment is needed.
HD333 Specifications
Specifications are based on available product information and may vary by final configuration.
| Category | Specification |
|---|---|
| Product Name | Anti-Recording Bluetooth Speaker HD333 |
| Product Type | Bluetooth speaker with anti-recording function |
| Power Consumption | 20W |
| Wireless Connection | Bluetooth 5.0 |
| Battery Capacity | 6600mAh lithium battery |
| Battery Life | ≥ 2.5 hours |
| Dimensions | 94 × 94 × 168 mm |
| Weight | 1 kg |
| Working Temperature | -10°C to 45°C |
| Control Methods | Onboard control, mini program control, remote control |
Request HD333 Information
Contact HDX International for product details, pricing, and application recommendations for the HD333 Anti-Recording Bluetooth Speaker.

