SKU: 70537010246

Radiomaster DBR4 Dual band Xross Gemini ExpressLRS Receiver

$19.75 $21.95
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  • USA
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Ships within 48 hours · Estimated delivery Sep 16 - Sep 21

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Description

Radiomaster DBR4 Dual band Xross Gemini ExpressLRS ReceiverFeatures Telemetry RF power Max 2x 100Mw Experience unmatched reliability with dual0band ELRS Gemini Xrossband ELRS Gemini 2. 4GHz ELRS Gemini 868 915MHz 4 Discrete antennas for optimal antenna arrangement Specifications Item: DBR4 Gemini Xrossband 2. 4GHz 915MHz ExpressLRS Receiver Type: ISM2. 4G FCC 915M MCU: ESP32 RF chip: Semtech LR1121 x2 Telemetry RF power: Max 100mw Antenna 2x 2. 4GHz wire 2x 915MHz wire Frequency range: 2. 404 2. 479GHz 903. 5

Features

  • Telemetry RF power Max 2x 100Mw
  • Experience unmatched reliability with dual0band ELRS Gemini Xrossband
  • ELRS Gemini 2.4GHz
  • ELRS Gemini 868/915MHz
  • 4 Discrete antennas for optimal antenna arrangement

Specifications

  • Item: DBR4 Gemini Xrossband 2.4GHz/915MHz ExpressLRS Receiver
  • Type: ISM2.4G/FCC 915M
  • MCU: ESP32
  • RF chip: Semtech LR1121 x2
  • Telemetry RF power: Max 100mw
  • Antenna 2x 2.4GHz wire | 2x 915MHz wire
  • Frequency range: 2.404-2.479GHz / 903.5-926.9MHz
  • Maximum receive refresh rate: 500Hz 
  • Minimum receiver refresh rate: 50Hz
  • Working voltage: DC 4.5-8.0V
  • Weight: Without antennas 2.7g/ with antennas 5.3g
  • Dimension: 27.2*27.2mm
  • Firmware Version: ExpressLRS v3.3.2 pre-installed
  • Bus interface: CRSF

Includes

  • 1x DBR4 Dual band Xross Gemini ExpressLRS Receiver
  • 2x 2.4GHz wire antenna
  • 2x 915MHz wire antenna
  • 4x 100mm wires
  • 4x 4mm Red vibration dampeners
  • 4x 3mm Black vibration dampeners
  • 1x Manual card

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Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 70537010246

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4.1 ★★★★★
Based on 29 reviews
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Product Reviews
E
Verified Purchase
Em N
Belleville, US
★★★★★ 4
help with dry mouth
Scent Name: Berry, Size: 100 Count
I'VE BEEN USING THESE AT NIGHT FOR SEVERAL YEARS AND THEY LAST MOST OF THE NIGHT. I LIKE THE MILD FLAVOR TOO.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
K
Verified Purchase
Kenneth
Lowell, US
★★★★★ 5
A Miracle for dry mouth!!
Scent Name: Berry, Size: 100 Count
I don't know what I would do without this product. I suffer from severe dry mouth from my medications and xylmelts have been a miracle for me. I buy them regularly and cannot live without them I sleep comfortably with them in my mouth and they help beyond belief.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
B
Verified Purchase
Beverly White
Lake Worth, US
★★★★★ 5
Dry mouth remedy
I have been using these for a couple of years and they work great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
J
Verified Purchase
Jeff D.
Louisville, US
★★★★★ 5
Slim profile, stays anchored all night (Berry flavor is great!)
Scent Name: Berry, Size: 100 Count, Scent Name: Berry, Size: 100 Count
I rely on these nightly to combat dry mouth, and they deliver exactly what is promised. The adhesion mechanism is impressive—once placed against the gum, the disc stays securely anchored for a full 6–8 hours without shifting, allowing me to sleep without interruption. ​The profile is ideal; the discs are incredibly slim and unobtrusive, so you don't feel like you have a bulky object in your mouth while trying to fall asleep. Despite being so compact, they pack enough moisture to last until morning. The Berry flavor is mild and soothing, making it a perfect bedside companion. Highly recommended.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
G
Verified Purchase
Gabrielle Grim
New York, US
★★★★★ 5
Excellent product for dry mouth
Scent Name: Berry, Size: 100 Count
If you are having trouble with dry mouth, especially while sleeping, this is definitely the product for you. I have severe dry mouth and have tried multiple things including hard candy (yes, I know not very smart) as well as different biotin products, the mouthwash, the spray and the gel, which all do work, but do not last for very long. These stay in place open the corner of your mouth, last for hours and truly work. I highly recommend it if you are having a dry mouth issue
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 5, 2026

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