DBR4 Dual Band Xross Gemini ExpressLRS Receiver

Product detailed description

The DBR4 Dual Band Xross Gemini ExpressLRS Receiver is a high-end remote control receiver that delivers revolutionary performance in drone control and FPV systems. This receiver features advanced Gemini Xrossband technology that enables simultaneous operation in the 2.4 GHz and 868/900 MHz bands. As a result, it offers stable and reliable connectivity even in harsh and noisy environments, making it ideal for applications with high range requirements and minimal interference.

The DBR4 uses the innovative ExpressLRS protocol, which is known for its low latency and high refresh rate, enabling fast and responsive drone control even in challenging environments. For advanced users, this receiver is optimized for fast communication and allows flexibility when used with different transmitters that support this protocol.

Key Features:

• Gemini Xrossband technology: allows simultaneous operation in two frequency bands (2.4 GHz and 868/900 MHz), providing greater immunity to interference and greater range.
• ExpressLRS protocol: Provides fast and accurate low-latency response, which is key for FPV racing and remote drone control.
• Dual Antenna System: Improves signal stability and ensures seamless connectivity even in challenging terrain.
• Compact design.
• Long range: thanks to the combination of dual band and low interference, the receiver is able to communicate over longer distances with minimal delay.

Specifications:

• 2.4 GHz and 868/900 MHzfrequency bands.
• Latency: Low (suitable for fast response and precise control)
• Protocol: ExpressLRS
• Power Support: 5V
• Size: Compact design suitable for most drones and FPV systems
• Compatibility: Fully compatible with transmitters supporting ExpressLRS protocol

Ideal for:

• FPV racing where low latency and stable connections are important
• Remote control of drones in harsh, high-interference environments
• Professional drones requiring long range and reliable communication

Sub-GHz 250Hz (-111dBm)
Increase speed: Achieve higher packet transmission speeds with improved performance in the Sub-GHz band.

Sub-GHz 200Hz Full (-111dBm)
Optimized for Mavlink: Double the packet rate over current 900 SX1276 hardware, specifically targeted at Mavlink users for more stable connections and reduced interference.

Dual Band X150Hz (-112dBm)
Gemini Mode: experience simultaneous transmissions in the Sub-GHz and 2.4GHz bands, providing higher performance and lower interference with a 150Hz transmission rate.

Dual Band X100Hz Full (-112dBm)
Enhanced Gemini Mode: Get the same benefits of dual frequency at 100Hz transmission rate with full 16-channel resolution, ensuring a strong and stable connection even in challenging conditions.

Introducing K modes
DK500 (Comes in ExpressLRS V3.5): Designed specifically for RC speed and reliability enthusiasts. K Modes introduces a new generation of FSK modulation with built-in packet correction (Forward Error Correction). As with the FLRC D500, the DK500 sends repeated packets to reduce packet loss in challenging race conditions. Combined with a Gemini-enabled transmitter and receiver, the RC reliability is unmatched.

K1000 Full SubGHs (Comes in ExpressLRS V3.5). This mode was designed for maximum data throughput when used with MAVLink, but also achieved excellent long range performance in testing.

This makes the DBR4 an ideal choice for users who require a reliable and powerful receiver with flexible connectivity options, designed for professional and hobby drone and FPV flying applications.

The package includes:

• DBR4 Dual Band Xross Gemini ExpressLRS Receiver (main unit)
• 2x 2.4 GHz wired antennas
• 2x 900 MHz wired antennas
• Installation accessories (including cables and connectors for easy installation)
• Manual with installation and configuration instructions