| Manufacturer | BOSCH |
| Product Name | TR-825 B3 US UHF Beltpack, 2CH, Band B3, 4M Headset |
| Manufacturer Part Number | TR-825 B3 US |
| Product Type | UHF Beltpack Intercom System |
| Form Factor | Bodypack |
| Power Source | Battery-powered |
| Battery Type | AA Alkaline |
| Battery Installed Quantity | 6 |
| Channels | 2 |
| Frequency Band | Band B3 (572–596 MHz) |
BOSCH TR-825 B3 US UHF Beltpack, 2CH, Band B3, 4M Headset

Key Benefits
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- Designed for portability and clear communication in professional AV and broadcast environments
- TAA compliance makes it suitable for secure and U.S. government-related applications
- Reliable UHF dual-channel performance ideal for critical communications
Product Overview
The BOSCH TR-825 B3 US UHF beltpack delivers high-performance two-channel communication on Band B3, ideal for live events, broadcasting, and intercom usage. Its compact size—3.75” width, 2.02” depth, and 5.35” height—ensures discretion and comfort during extended wear. Included is a 4M headset and 6-battery power setup for operational longevity. Manufactured in the United States with TAA compliance, this system is tailored for secure and institutional environments.
Specifications
Product Overview
Wireless Features
| Wireless Technology | UHF |
| Operating Frequency Range | 572–596 MHz |
| Channel Spacing | 25 kHz |
| Modulation | FM |
| RF Output Power | 100 mW (typical) |
| Antenna Type | Internal or detachable antenna (depends on system configuration) |
Compliance & Origin
| Country of Origin | United States |
| TAA Compliant | Yes |
| FCC Certification | Part 74 Certified |
| RoHS Compliant | Yes |
| WEEE Compliant | Yes |
Advanced Security Features
| Encryption Support | No (analog FM transmission) |
| Secure Communication | No (clear audio transmission) |
Interfaces
| Audio Input | 4-pin headset connector (dynamic and electret mic supported) |
| Audio Output | Headphone out via 4-pin headset connector |
| Headset Connector Type | 4-pin XLR-type |
| Wired Interface Support | Yes (via base station or adapter) |
Physical & Environmental
| Width | 3.75 in |
| Depth | 2.02 in |
| Height | 5.35 in |
| Weight with Batteries | Approx. 0.9 lb (410 g) |
| Enclosure Material | High-impact ABS plastic |
| Mounting Options | Clips onto belt or clothing |
| Operating Temperature | 0°C to 50°C (32°F to 122°F) |
| Storage Temperature | -20°C to 60°C (-4°F to 140°F) |
| Operating Humidity | 0 to 95% (non-condensing) |
Cloud Management & Licensing
| Remote Management Support | No (standalone device) |
| Licensing Required | License may be required for UHF operation depending on country |
| Firmware Upgradeable | No (device operates without software interaction) |