DBR4 Dual Band Xross Gemini Receiver for ELRS Protocol
Available in stock (60)
Introducing the DBR4 Receiver: the perfect companion to the RadioMaster Nomad. The DBR4 is a cutting-edge dual-band, dual-channel Gemini receiver that ensures seamless compatibility with the Nomad module. Engineered for superior performance, the DBR4 boasts two dual-band sections, each capable of simultaneously receiving 2.4GHz and 900MHz signals. This innovative design allows for the reception of two data streams simultaneously, providing exceptional interference rejection and eliminating the risk of lost packets. With the DBR4, you can trust that your signal remains robust and reliable, giving you the confidence to push your limits and explore new horizons. Elevate your RC experience with the unparalleled connectivity and performance of the DBR4 Receiver.
Features
- Telemetry RF power: Max 2x 100mw
- Experience unmatched reliability with dual-band ELRS Gemini Xrossband
- ExpressLRS Gemini 2.4GHz
- ExpressLRS Gemini 868/900MHz
- 4 Descrete antennas for optimal antenna arrangement
- 20 X 20mm mounting holes
- Xrossband GemX support
Specification
- Item: DBR4 Gemini Xrossband ExpressLRS Receiver
- Type: ISM_2.4, FCC_915
- MCU: ESP32
- RF chip: Semtech LR1121 x 2
- Telemetry RF power: Max 100mW
- Antenna: 2 x 2.4GHz wires & 2 x 900MHz wires
- Frequency Range: 2.404 - 2.479 GHz / 903.5 - 926.9 MHz
- Maximum receive refresh rate: 500Hz (1000Hz coming soon in ExpressLRS V3.4)
- Minimum receiver refresh rate: 50Hz
- Working voltage: DC 4.5 - 8.4V
- Weight: Without antennas 2.70g / With antennas 5.30g
- Dimension: 27.20 *27.20mm
- Firmware Version: ExpressLRS v3.3.2 pre-installed
- Bus interface: CRSF
New Packet Rates
Sub-GHz 250Hz (-111dBm)
- Speed Boost: Achieve faster packet rates with enhanced sub-GHz performance.
Sub-GHz 200Hz Full (-111dBm)
- Optimized for Mavlink: Double the packet data of current 900 SX1276 hardware, catering specifically to Mavlink users for a more robust link and reduced interference.
Dual Band X150Hz (-112dBm)
- Gemini Mode: Experience simultaneous sub-GHz and 2.4GHz transmissions, providing robust performance and reduced interference with a packet rate of 150Hz.
Dual Band X100Hz Full (-112dBm)
- Enhanced Gemini Mode: Achieve the same dual-frequency transmission benefits at a 100Hz packet rate with full 16 channel resolution, ensuring strong and stable connectivity even in challenging environments.
Introduction of K Modes
DK500 (Coming in ExpressLRS V3.5)
- Design specifically from the ground up for lovers of speed and RC reliability. K modes are next generation FSK modulation with built in packet repair (Forward Error Correction). Just like FLRC D500, DK500 sends repeat packets to reduce packet loss in challenging race event environments. Coupled with a Gemini enabled Tx and Rx, nothing comes close to RC reliability.
K1000 Full SubGHs (Coming in ExpressLRS V3.5)
- Yes, you read that right, 1000Hz in the 868/900MHz Domain! While this mode has been designed for maximum data throughput when used with MAVLink, don't be fooled by the 1000Hz, during development it was tested it at long range.
Dimensions
Includes
- 1x DBR4 Gemini Xrossband ExpressLRS Receiver
- 2x 2.4 GHz wire antennas
- 2x 900 MHz wire antennas
- 1x CRSF wire
- 4x 4mm Red vibration dampeners
- 4x 3mm Black vibration dampeners
- 1x Manual card
Couldn't load pickup availability
Product Specifications
Product Specifications
What's Included
What's Included
Shipping & Returns
Shipping & Returns
Shipping: Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days depending on your location.
Returns: We are happy to accept returns at Rotor Riot. As long as your item qualifies based on the guidelines below, you can print out a return form, fill out the requested information, and send the items back to us with the return form included. Once we have the package we will verify that the below guidelines are met, and then issue your refund.
⚠ FPV Regulatory Notice
⚠ FPV Regulatory Notice
The use and operation of this type of product in the USA and many other countries may require a license and some countries may forbid its use entirely. In the USA, you will need a "HAM" amateur radio license. Learn more about HAM licenses, and find a HAM license exam session in your area.
It is your responsibility to ensure that the use of this product meets the requirements imposed by your government's rules and regulations for RF devices.
Do not purchase this product if you are unsure of the government requirements or are not able to comply with them. Rotor Riot cannot be held responsible for your actions if you purchase and/or use this product in violation of your government's regulations. By agreeing to our terms and conditions during the check-out process, you also agree to have read and to understand this notice.
⚠ Remote ID Notice
⚠ Remote ID Notice
The FAA now requires most drones flown in US National Airspace to have Remote ID capability. This drone product does not comply with Standard Remote ID requirements and is therefore intended only for use Outside US National Airspace (ONAS). Such areas include FAA-Recognized Identification Areas (FRIA) and indoor spaces. It is your responsibility to ensure the use of this product complies with Remote ID requirements by flying ONAS locations or by installing a Remote ID Broadcast Module.
For more information on Remote ID visit:
https://www.faa.gov/uas/getting_started/remote_id/drone_pilots
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Discover more in our FAQ
Shoot our team an email & we’ll get back to you ASAP
How long does it take to process an order?
How long does it take to process an order?
Orders are typically processed within 1–2 business days. You will receive a confirmation email with tracking details once your order has been shipped. Please note that processing times may be slightly longer during high-demand periods or sales events.
Do you ship internationally?
Do you ship internationally?
Yes, we offer international shipping to most countries. Shipping rates and delivery times vary depending on the destination. Any applicable customs duties or taxes will be the responsibility of the recipient.
What is your return policy?
What is your return policy?
We are happy to accept returns at Rotor Riot. As long as your item qualifies based on the guidelines below, you can print out a return form, fill out the requested information, and send the items back to us with the return form included. Once we have the package we will verify that the below guidelines are met, and then issue your refund. If you received an incorrect item, or if your item is defective it is not a return, and you will need to contact customer support to open a ticket. If you have any further questions about how this process is handled please contact customer support for details.
- An item is eligible for return if it is new and unopened. This means that all of the original manufacturer’s packaging is still intact.
- Returns need to be shipped back to us within 15 days of receiving the items for a full refund. After this time you will only be eligible for store credit. (All DJI Avata Bundles must be returned within 7 days)
- Refunds are only issued after the item has been received and processed by our staff. This can take up to 3 business days after we receive the package.
- Once a refund is approved you will be notified by email. Please allow up to three days for this to be processed by your banking institution.
- Built-to-order drones that are returned are subject to a 25% restocking fee. If an order is returned to us due to customs or import fees not being paid the items are subject to a 25% restocking fee.
- Returns will always go back into the account that was used at checkout.