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Radiomaster DBR4 Dual Band Xross Gemini ExpressLRS Receiver

Communication & Data Links
by Peryton

Description

The Radiomaster DBR4 is a cutting-edge dual-band ExpressLRS receiver designed for RC applications. It features simultaneous 2.4GHz and 900MHz reception with dual RF chips, providing exceptional interference rejection and packet loss prevention. With support for high refresh rates up to 500Hz (1000Hz coming soon) and multiple packet rate modes including Gemini dual-band operation, it offers robust connectivity for FPV drones and other RC vehicles.

About the Company

Peryton

Peryton is a drone technology company specializing in FPV (First Person View) drones and drone components. They offer a range of drone products, services, and custom drone solutions for enthusiasts...

Core Information

Serving industries
Air Ground
Model number / Variant
DBR4
Release/Launch year
2024
Name
Radiomaster DBR4 Dual Band Xross Gemini ExpressLRS Receiver
Product status
In Production

Product Classification

Link roles
Command & Control (C2) Telemetry
System type
RF Radio Transceiver
Supported platform classes
sUAS UGV
Operating environment
Airborne Ground
Link topology
Point-to-Point
LOS/BLOS capability
LOS
Duplexing modes
Half-Duplex

Frequency & Spectrum

Frequency bands
900 MHz ISM 2.4 GHz ISM
Regional spectrum compliance
FCC (US) CE/ETSI (EU)
Receiver sensitivity (dBm)
-112
Maximum TX power (dBm)
20
Frequency agility/hopping
Spectrum licensing
Unlicensed/ISM

Data & Performance

Modulation/Coding
Custom/Proprietary
QoS features
Forward Error Correction
Range conditions
Line-of-sight conditions with optimized antenna arrangement
MIMO/Spatial streams
2

Interfaces & Protocols

Physical interfaces
Serial UART
Control/Telemetry protocols
MAVLink Proprietary
Antenna connectors
U.FL
Number of antenna ports
4

Security

Encryption standards
Proprietary
Anti‑jam/Resilience features
FHSS
Export control classification
EAR99
Key management
Pre-Shared
Authentication methods
Pre-Shared Key (PSK)

Power & Physical

Power options
DC
Mounting options
Airframe/Internal
Included antenna types
Omnidirectional
Weight (g)
5
Ingress protection (IP rating)
None
Dimensions (mm)
27.20 x 27.20 mm
Input voltage range (V)
4.5 – 8.4V

Software & Management

Configuration methods
Web UI Desktop App
Telemetry/Integration
MAVLink
OTA firmware updates

Compatibility & Integration

Autopilot compatibility
ArduPilot PX4
GCS compatibility
QGroundControl Mission Planner
Interoperability standards
Proprietary
Integration notes
Designed as companion to RadioMaster Nomad dual-band module; supports 20x20mm mounting pattern; includes vibration dampeners for installation

Certifications & Compliance

Certifications/Marks
FCC CE
Spectrum approval regions
US EU