| Manufacturer | BOSCH |
| Product Name | BOSCH TR-825 B3 R4 US UHF 2CH Beltpack with 4F Headset |
| Manufacturer Part Number | TR-825 B3 R4 US |
| Product Type | UHF 2-Channel Wireless Beltpack System |
| Form Factor | Beltpack |
| Included Accessories | 4F Headset |
| Number of Channels | 2 |
| Battery Installed Quantity | 6 |
| Power Source | Battery Powered |
| Frequency Band | UHF Band B3 |
| UPC | 800549890014 |
BOSCH TR-825 B3 R4 US UHF 2CH Beltpack with 4F Headset

Key Benefits
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- Designed for professional-grade wireless communication in portable audio settings
- TAA-compliance supports eligibility for government and institutional applications
- Long battery life with six pre-installed batteries ensures dependable operation during critical tasks
Product Overview
The BOSCH TR-825 B3 R4 US is a UHF 2-channel beltpack system designed for portable audio applications. It comes with a 4F headset and operates in Band B3 for dependable wireless performance. With its compact dimensions (3.75" W x 2.02" D x 5.35" H) and the inclusion of six installed batteries, it supports extended usage in professional environments. Manufactured in the United States and fully TAA-compliant, it is suitable for use in federal and institutional communication setups.
Specifications
Product Overview
Wireless Features
| Wireless Technology | UHF |
| Frequency Range | 482–518 MHz |
| Channel Selectability | Manually selectable |
| Number of Selectable Frequencies | 238 |
| Antenna Type | Integrated |
Compliance & Origin
| Country of Origin | United States |
| TAA Compliant | Yes |
| FCC Certification | Yes |
| RoHS Compliance | Yes |
Advanced Security Features
| Encrypted Transmission | No |
| Interference Protection | Yes (UHF companding technology) |
| Tamper Detection | No |
Interfaces
| Microphone Input Connector | 4-pin female mini connector |
| Audio Output | Wireless RF Transmission |
| Headset Interface | 4F connector type |
| RF Carrier Frequencies | 482–518 MHz |
| Frequency Response | 50 Hz to 15 kHz |
| Modulation | FM |
| RF Output Power | 50 mW (typical) |
Physical & Environmental
| Width | 3.75 in |
| Depth | 2.02 in |
| Height | 5.35 in |
| Weight | 0.75 lb (approx including batteries and headset) |
| Operating Temperature | –10 °C to +50 °C |
| Storage Temperature | –40 °C to +70 °C |
| Operating Humidity | 0 to 95% (non-condensing) |
| Enclosure Material | ABS thermoplastic |
| Color | Black |
Cloud Management & Licensing
| Remote Management | |
| Cloud Control Platform | |
| License Requirements | No additional licensing required |