SKU: 2063593570

Happymodel ExpressLRS ELRS 2G4 F4 Whoop AIO Flight Controller

Sale price$74.69 Regular price$82.99
Save 10%

Pay in installments of $20.75 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 10 - Aug 15

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Happymodel ExpressLRS ELRS 2G4 F4 Whoop AIO Flight ControllerThe worlds first AIO 5in1 F4 flight controller with integrated SPI 2. 4GHz ExpressLRS receiver has been launched. The flight controller integrates SPI controlled 2. 4GHz ExpressLRS receiver, Dshot protocol 4 in 1 ESC, 5. 8GHz 40ch video transmitter and Betaflight OSD. Ultra small size and ultra stable remote control range can improve the range of the originals SPI receiver. And because the 2. 4GHz ExpressLRS receiver is equipped with the SX1280 radio

The world’s first AIO 5in1 F4 flight controller with integrated SPI 2.4GHz ExpressLRS receiver has been launched. The flight controller integrates SPI controlled 2.4GHz ExpressLRS receiver, Dshot protocol 4-in-1 ESC, 5.8GHz 40ch video transmitter and Betaflight OSD. Ultra-small size and ultra-stable remote control range can improve the range of the originals SPI receiver. And because the 2.4GHz ExpressLRS receiver is equipped with the SX1280 radio frequency chip with high sensitivity, high packet rate and low latency, this flight controller is the one that all Race/Freestyle pilots needed. It is suitable for use in Tiny whoop Race or Toothpick Freestyle, and can also be used in 1S ultra-lightweight Nano Long Range platform.

Check out all our Flight Controllers and the rest of our HappyModel Express LRS Products!

Specifications:

  • Brand Name: Happymodel
  • Item Name: F4 2G4 Flight Controller Set
  • Betaflight Firmware/Diff document: Click Here
Flight controller MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
Sensor: MPU-6000(SPI connection)
Original whoop size compatible
Power supply: 1S battery input (DC 2.9V-4.35V)
Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready
Built-in Betaflight OSD(SPI Control)
Built-in 5.8G VTX
Built-in SPI ExpressLRS 2.4GHz receiver, Built-in 5V 1A BECFlight controller firmware target: CRAZYBEEF4SX1280
Onboard 4in1 ESC MCU upgraded to EFM8BB21
Power supply: 1S LiPo/LiPo HVCurrent: 5A continuous peak 6A (3 seconds)
Support BLHeliSuite programmable
Factory firmware: O_H_5_REV16_8.HEX
Default protocol: DSHOT600
Onboard SPI ExpressLRS 2.4GHz Receiver Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz
RF Frequency: 2.4GHzAntenna : SMD antenna
Telemetry output Power: <12dBmReceiver protocol:  SPI ExpressLRSCould bind with Happymodel ES24TX , ES24TX Lite, ES24TX Slim and DIY 2.4GHz ELRS TX module(need to flash the same version ELRS firmware)
Onboard 5.8g VTX Output power: 25mw~200mw switchable
Frequency: 40CH
Input voltage: 3.3V 5.5V
Current consumption: 300mA(type)
Frequency: 5.8GHz 5bands 40 channels(include Race band)Smartaudio ready
Onboard voltage and Amperage meters  settings Voltage meter scale setting 110
Amperage meter scale setting 1175


Bind procedure:

1. Power the flight controller by connecting USB. Please make sure that the port driver of the flight controller is correctly installed on the computer, then open Betaflight Configurator(Latest version) to connect, enter to the “receiver” interface, and then click “Bind Receiver”, the red LED at the bottom of the flight controller will flash quickly, which means that the SPI ELRS receiver enters the bind mode. There is another way to make the receiver enter the bind mode: after connecting to the Betaflight configurator, move to the CLI interface and enter “bind_rx” in the command line.

2. After correctly connecting the ES24TX or ES24TX Lite/Slim module or DIY 2.4G ELRS TX module to your Opentx radio transmitter, copy the latest version of ELRS.LUA file to the SD card in the remote controller. The directory is “SD Card/Scripts/tools”, Then run ELRS.LUA and upgrade the specified TX frimware through Wifi, and then click “bind” to link with the SPI ExpressLRS receiver. Note: You need to adjust the Packet Rate to 500Hz from the ELRS interface of your radio controller before binding.

3. After the binding is successful, the Red LED at the bottom of the flight controller will getting to be solid, and the telemetry can be received at the same time.

4. The meaning of the LED status of the SPI receiver: the LED is getting to be solid, indicating that the bind is successful or the connection and communication is normal, the LED flashing quickly indicates that the receiver is in binding mode, and the LED flashing slowly indicates that the there is no signal received from the radio controller.

Notes: 

Since Betaflight has not yet released the official firmware that could supports the SPI Expresslrs protocol, the current version is the Beta version(Target:CrazybeeF4SX1280). Betaflight will update to their official target soon. Please feel free to contact with us if you have any issues with this Beta version Firmware.

Package Includes:

  • 1 x F4 2G4 Flight Controller Set

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: 2063593570

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.5 ★★★★★
Based on 22 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
B
Verified Purchase
Bernardo Bronstein
Pawtucket, US
★★★★★ 5
Effective and Gentle – Koji White Pure Kojic Acid Soap Delivers Visible Skin Brightening Results!
I’ve been using Koji White Pure Kojic Acid Skin Brightening Soap for a few weeks now, and I’m seriously impressed with the results! If you're looking for a gentle yet effective way to exfoliate, brighten, and improve the appearance of your skin, this soap is definitely worth trying. First of all, the soap is formulated with kojic acid, a powerful ingredient known for its ability to brighten skin and reduce dark spots, hyperpigmentation, and uneven skin tone. I’ve struggled with some dark spots and blemishes on my face, and after using this soap consistently, I’ve already noticed a noticeable difference. My skin looks brighter, more even-toned, and feels much smoother. The soap itself has a glycerin base, which makes it incredibly gentle on the skin. Despite its exfoliating properties, it doesn’t feel harsh or drying like some other exfoliating soaps I’ve tried. In fact, it leaves my skin feeling moisturized and soft, not tight or stripped. I appreciate that it doesn't have any harsh chemicals, making it suitable for both face and body. The lather is rich and creamy, and a little goes a long way, which makes the bar last for a decent amount of time. I use it in the shower and also apply it to my face as part of my evening skincare routine. It rinses off easily without leaving any residue behind. I also love that this soap is non-irritating, even on my sensitive skin. It doesn’t cause redness, breakouts, or any dryness, which can sometimes happen with other brightening or exfoliating products. It’s perfect for daily use, and I've felt comfortable using it both in the morning and evening. If you're looking for a natural and affordable way to brighten your skin and fade dark spots, I highly recommend Koji White Pure Kojic Acid Skin Brightening Soap. It’s effective, gentle, and delivers visible results without being harsh on your skin. After a few weeks of use, my skin feels healthier, brighter, and more radiant. Definitely a staple in my skincare routine now!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 15, 2024
F
Verified Purchase
Fatimah Ji-cheol🧸
Waukegan, US
★★★★★ 1
Breaks your skin out!!! Made in THAILAND not Japan
I waited a while to write a review of this Kojic Acid soap because I wanted to give it time to...work. I ordered the soap on TWO separate occasions within a span of six months. There are two bars in the box and both times I ordered, it was delivered on time, and well packaged. Why did I order this soap? I have Keratosis Pilaris and was hoping to find a soap that could help with exfoliation, as well as helping lighten hyperpigmented areas like between my thighs,and other scars or marks left behind from skin breakouts. Usually,I use glycolic peels and lactic acid to help with hyperpigmentation since I have more of a chocolate complexion. So I thought I would give this soap a try. I will begin with the positives. First,this soap is nicely packaged and smells like...ORANGES! The first month,I used the soap... not everyday but a few times a week. I LOVED IT! Between my thighs is lighter now and my skin would feel exfoliated after leaving it on for about five minutes,and then rinsing it off. THEN..... After a few months of using it, MY SKIN STARTED TO BREAK OUT. I'm talking about first,my skin would become EXTREMELY ITCHY. Then little bumps would pop up all over my body. I never had blemishes on my chest area. NOW I DO. I wanted this soap to help me get rid of blemishes! Not to cause them. Even as I type out this review,my skin is itching terribly! I used the soap this morning. My skin is always a bit dry afterwards,but then I use lotion or oil to moisturize. At this point,I am SURE it is this soap that is causing grief. Since I am dark skinned,I now have to repair the damage done from this soap. It's upsetting honestly. I know some people will STILL purchase this soap even though there are numerous reviews of it breaking peoples skin out.But just know,you've been warned about the adverse affects. I'm going to go back to using glycolic acid and lactic acid to help fade blemishes and exfoliate. I will never purchase this soap again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 17, 2018
H
Verified Purchase
Hal B.
Cuba, US
★★★★★ 5
Best Soap
Great soap. Eliminates old person smell and lightens dark spots.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
A
Verified Purchase
Amazon Customer
Phoenix, US
★★★★★ 5
Koji soap works!
Soap works amazing on skin discoloration!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
N
Verified Purchase
Naomi
Port Orchard, US
★★★★★ 5
Hydrating lotion
I’m not sure about the skin care properties of this lotion. I haven’t used it long enough or consistently enough to state that it helped with my hyper pigmentation. However, I can’t say that it absorbs really well. It feels comfortable on the skin. And it is super hydrating. I’m considering purchasing it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026

recommand products