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September Sale: Get an extra 20% off all products when you use code SEPT20 at checkout.
September Sale: Get an extra 20% off all products when you use code SEPT20 at checkout.

Happymodel Crux35 ELRS V2 - 150mm 3.5 Inch 4S Ultralight FPV Racing Drone with Analog & Digital HD, CADDX Nebula Pro / ANT 1200TVL Camera - Perfect for Drone Enthusiasts

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Original price $307.99
Original price $275.99 - Original price $527.99
Original price $307.99
Current price $220.99
$220.99 - $383.99
Current price $220.99

Get an extra 20% off the above price with code SEPT20. Apply discount at checkout.

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Version: Analog
Receiver: SPI FrSky

Introducing the CRUX35: Ultra-Lightweight FPV Racing Drone

Meet the CRUX35/CRUX35 HD, an ultra-lightweight 3.5Inch FPV Freestyle FPV Racing Drone that is perfect for both beginners and experts. Weighing only 87g for the analog version and 108g for the digital HD version, this drone offers superior performance and agility in the air. The Crux35 series drone is equipped with Happymodel EX1404 high-efficiency motors and HQPROP 3.5-inch three-blade propellers to ensure maximum thrust-to-weight ratio while remaining energy-efficient. Flight enthusiasts will especially appreciate the HD version's CADDXFPV Nebula and Vista HD image transmission system, or the analog version's CADDXFPV Ant ant camera.


  • Ultra-lightweight 3.5-inch BNF FPV Freestyle Drone
  • HD video transmission and analog video transmission options
  • Integrated ExpressLRS SPI receiver or Frsky SPI D8/D16 receiver
  • High efficiency EX1404 power system
  • Can be equipped with Naked Gopro or SMO4K
  • Supports 3-4S battery (4S 750mah battery recommended, maximum support 4S 1100mah)


Please refer to the Manual of ELRS Version and Frsky Version for more information.


  • Happymodel


  • Crux35 Analog / Crux35 HD


  • 150mm


  • 87g (Analog); 108g (HD)


  • 130mmx130mmx45mm (without propellers)

Version Optional:

  • Analog / HD

Receiver optional:

  • UART ExpressLRS 2.4GHz (ELRS 2.4G RX) / SPI Frsky D8/D16 (S-FHSS compatible)

Camera option:

  • HD version Nebula+Vista
  • Analog version Ant+OVX303 VTX

Flying time:

  • 9min~15min with 4S 750mah battery
For more information about the motor, propellers, flight controller, onboard 4in1 ESC, onboard UART ExpressLRS 2.4GHz Receiver, onboard SPI Frsky 2.4GHz receiver, Caddx FPV Digital HD Camera Nebula Nano Kit (Digital HD version), Caddx ANT 1200tvl camera (Analog version), OVX303 5.8Ghz VTX (Analog version), recommended batteries, and package inclusions, please refer to the original text above.

Product Specifications


Mode: EX1404
KV options: KV3500
Stator Diamter:14mm
Stator Length:4mm
Shaft Diameter: Φ1.5mm
Motor Dimension(Dia.*Len):Φ15mm*15mm


Propeller Diameter: 3.5 inch
Pitch : 2
Blades : 3
Material : Poly Carbonate
Weight : 1.5g
Hub Diameter : 10mm
Hub Thickness:4.7mm
Shaft :1.9/1.5/1.9mm
Adaptor Rings : NO

Flight controller

(ELRS Version)

MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
Sensor: ICM42688P or BMI270 (SPI Control)
Mount pattern: 25.5×25.5 M2
Power supply: 2-4S Lipo battery
Built-in 20A Blheli_s ESC each
Built-in Betaflight OSD(SPI Control)
Built-in UART ExpressLRS 2.4GHz receiver
Built-in 5V 1.5A BEC
Flight controller firmware target: CRAZYBEEF4DX

Flight controller

(Frsky version)

Model: CrazybeeF411 FRSKY

MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
Sensor: BMI270 or ICM42688P(SPI connection)
Board size: 28.5 * 28.5MM
Power supply: 2-4S battery input (DC 8V-17V)
Built-in 20A(each) Blheli_S 4in1 ESC Dshot600 ready
Built-in Frsky D8/D16 SPI receiverBuilt-in 2.4G Power Amplification
Built-in Betaflight OSD(SPI Control)
Built-in Current meter
Built-in 5V 1.5A BEC
Built-in voltage detectionFirmware target: MATEKF411RX

Onboard 4in1 ESC

MCU upgraded to EFM8BB21
Power supply: 1S LiPo/LiPo HV

Current: 5A continuous peak 6A (3 seconds)
Support BLHeliSuite programmable
Factory firmware: O_H_5_REV16_8.HEX
Default protocol: DSHOT300

Onboard UART ExpressLRS 2.4GHz Receiver

(ELRS 2.4G Receiver version)

Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz
RF Frequency: 2.4GHzAntenna plug: IPEX
Telemetry output Power: <12dBm
Receiver protocol: CRSF
Default firmware version: ExpressLRS V3.0.1

Onboard SPI Frsky 2.4GHz receiver ( SPI Frsky Receiver Version)

SPI BUS receiver
Frsky D8/D16/EU-LBT/, Futaba S-FHSS switchable on Betaflight
Channels: 8ch/16ch

Dual antenna
Failsafe support
No ground interference ( Transmitter and receiver 1 m from the ground): 400m

Caddx FPV Digital HD Camera Nebula Nano Kit

(Digital HD version)

Weight(camera included]: 24g

Antenna: 2.3g

Dimensions: Vista Kit 30×29×13mm

Camera 14×14×21mm

Operating Frequency: 5.725-5.850GHz

Transmitter Power[EIRP]: FCC/SRRC/MIC:<30dBm


Min.latencylend-to-end) 720p 60fps:32ms

Max.Transmission Distance FcC/SRRC: 4km


lnput Power: 7.4-26.4V

Power Output: 25mW/200mW/500mW/700mw

Goggles : Work with DJl goggles

Camera Sensor: 1/3”CMOS

Lens: 2.1mm,f/2.1

Shutter: Rolling

shutterFOV: 142°(D);122°(H);75°(V)

LHCP antenna

Caddx ANT 1200tvl camera

(Analog version)

Image Sensor: 1/3" CMOS Sensor

Horizontal Resolution: 1200 TVL

TV System: NTSC or PAL

IMAGE: 16:9 or 4:3

Synchronization: Internal

Electronic Shutter: PAL: 1/50~100,000; NTSC: 1/60~100,000

S/N Ratio : >52dB (AGC OFF)

Video Output: CVBS

Lens: 1.8mm

Min. Illumination: 0.001Lux@F1.2

Auto Gain Control: YES


WDR: Global WDR


Dimensions: 14*14mm(with bracket to 19*19mm)

Wide Power Input: DC 3.7-18V

Work Temperature: -20℃~+60℃

Weight: 2g (N.W.)

OVX303 5.8Ghz VTX

(Analog version)

Model: OVX303

Frequency: 5.8G 40CH

Transmitting Power: 0/RCE/25mw/100mw/300mw

Power supply: DC 5V

Current (5v): <650ma (300mw)

Weight: 1.5gram without antenna

Product Images


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