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Description
RadioMaster DBR4 Dual band Xross Gemini ExpressLRS ReceiverIntroducing 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
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.
Check out all our ExpressLRS Products, Receivers, and the rest of our RadioMaster Products!
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.
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
Specifications:
- 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
Package Includes:
- 1 * DBR4 Gemini Xrossband ExpressLRS Receiver
- 2 * 2.4 GHz wire antennas
- 2 * 900 MHz wire antennas
- 1 * CRSF wire
- 4 * 4mm Red vibration dampeners
- 4 * 3mm Black vibration dampeners
- 1 * Manual card
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.7 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
You will want to sleep on these sheets!
Color: Adelia Gray, Size: Queen Extra Deep Pocket
Buy these sheets! I have only slept on 100% percale cotton. No blends, no sateen mix, just pure percale cotton which these sheets deliver. The finish is soft, not rough or scratchy as some describe. Cotton, is not rough. Percale, however, may not be. for everyone. They like a like iron to keep them unwrinkled and smooth. Some describe the finish as crisp. Again, crisp, is not scratchy. Crisp is an old-fashioned texture that appeals to any who like to sleep on the cooler side. Not cold, simply cool. Cotton breaths, other fabrics do not. The fabric is light, but **not thin. Again, cotton percale is a lofty drape but with a cotton that breathes nicely. II purchased the extra deep pocket, queen size with an accurate fit. The days of misfitted bottom sheets are gone. These, slide on with ease. They are not oversized or sloppy. The elastic hugs the mattress with comfort. I did not need to struggle or attempt to stretch the fabric to encase my mattress. It was a proper fitting, fitted sheet. The elastic is plenty. The drape of the percale is perfection. The drop on both sides of the bed is again proper. Not overly generous and hanging to low, nor too short that they create a tug-o-war when sleeping to keep covered. They fall to the edge of the mattesss which is what I was wanting. These sheets also launder very nicely in cold water. The colors do not bleed. I dryer my sheets on perm-press despite percale is not that finish. It helps reducing wrinkling. When I hear my dryer chime, I instantly remove the sheets and lightly press them with an iron so the fabric performs as percale should. For those who like a wrinkled sheet that is soft, you will also be pleased. These are wonderful sheets that fulfill their product description, 100%. My only request is for more prints and colors like the rest of the other size mattresses. Queen, extra deep pocket is limited with selection which is unfortunate as more mattresses are made thicker, denser and with a struggle to purchase properly fitting sheets. These sheets are sized correctly to fit 22" and perhaps 23" mattresses. The days of small fitted sheets are past tense. Oh, also the pillowcases are generous. I sleep with regular sized pillows but this company cut the pillowcases to allow for queen or larger pillows so there is again, plenty of room. I am delighted to know this company and hope more prints will become available for extra deep pocket sleepers.
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Reviewed in the United States on April 1, 2026
★★★★★ 5
Great crisp, cooling, cotton sheets. Not soft like microfiber but theyre amazing for hot sleepers.
Color: Lama Multi, Size: Full
These are awesome. They are the crisp, rougher kind of cotton sheets but cooling. i actually wanted sheets that felt more rough and crisp. These are not uncomfortable at all but rather the opposite. i am a very hot sleeper and i was using microfiber before; these were a game changer, the difference is astounding. never going back to microfiber again. when i shift to turn the other way while i sleep, the sheets feel cool to the touch its actually amazing. also the llamas are very cute. Cotton wrinkles more than other fabrics in case you mind that. but its not noticeable on my pillows and my comforter covers the sheets anyway.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Great summer sheets
Color: Light Blue, Size: Queen, Color: Light Blue, Size: Queen
Love these sheets! I washed them before using. Went by the manufacturer's instructions and they came out beautifully. I purchased these for my summer sheets, and they are very soft and comfortable and really keeps me cool at night. I purchased the light blue, but they are more like aqua green. Not saying I don't like them, the color is very pretty. But if you are looking for light blue, they are not quite that. Are there wrinkles? Yes, of course. They're 100% cotton. Did it interfere with my sleep? Nope. Not at all.
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Reviewed in the United States on May 18, 2026
★★★★★ 4
100% cotton
Color: Dark Gray, Size: King
I have a king size hybrid Purple mattress, and while the fitted sheet pockets don’t exactly fit all the way to the bottom, they didn’t really have issues with riding up much. I just pull them back down when making the bed, and it’s not really an issue. They are a little crunchy at first, but I think they soften with washes. I appreciate that they are 100 percent cotton which was my reason for purchasing. For the price, I am satisfied, and will probably purchase more if I can’t find anything comparable with deeper pockets. I would consider them to be a good mid weight, breathable sheet set, making them nice year round sheets. I haven’t had any pilling issues yet, I will continue to use to be sure this doesn’t become a problem before I purchase another set. The gray color is very pretty and neutral, making it match with many other color schemes. As of now, if the pockets were just a little deeper, I’d give 5 stars.
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Reviewed in the United States on January 2, 2026
★★★★★ 5
Great Buy
Color: Sage Green, Size: California King
Pros: correct color as shown, lightweight, breathable at night, great for sensitive skin, fits corners of bed
Cons: after 2-3 washes, even following wash instructions the sheet does get smaller making it harder to fit bed.
Overall 10/10, would recommend buying & I will buy in future.
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Reviewed in the United States on June 2, 2026
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