SPI Frsky version comes with Betaflight 3.5.7 firmware in order to get better RSSI range . Bind code is “Frsky_bind” in the CLI Command
SPI Flysky version comes with Betaflight 4.2.2 firmware . Bind code is “Bind_rx” in the CLI command
SPI DSMX version comes with Customized Betaflight 4.3.0 firmware . Bind code is “Bind_rx” in the CLI command.
The receiver firmware of RXSR version is R-XSR_FCC_190311 that is not compatible with ISRM v2.x.x , use ISRM V1.1.3 

41gram 1-2s brushless Toothpick drone
New AIO 4in1 CrazybeeX flight controller
New 1202.5 brushless motor
XT30 connector
Recommend to use 2s 350mah/400mah/450mah/520mah battery
Compatible with Insta360 Go Camera

Brand Name: Happymodel
Item Name: Crux3
Wheelbase: 115mm
Size: 97mmx97mmx35mm(without propellers)
Weight: 41g(without battery)

Receiver option:
Internal SPI Frsky version (Compatible with ACCST D8/D16, Recommend D8 mode)
Internal SPI Flysky version(Compatible with AFHDS and AFHDS-2A Flysky transmitter)
Internal SPI DSM2/DSMX version(Compatible with Spektrum or Multiprotocol DSM2/X radio)
External Frsky RXSR receiver version(ACCST D16 sbus output)
External TBS Crossfire Nano receiver version

Package includes:

Item Name Qty
Crux3 Frame and canopy 1
Option1: CrazybeeX FR V2.2 built-in internal Frsky SPI D8/D16 receiver 1
Option2: CrazybeeX FS V2.2 built-in internal Flysky SPI receiver
Option3:CrazybeeX DXS V1.0 built-in internal DSM2/DSMX SPI receiver
Option4:CrazybeeX PNP V2.2 with External Frsky RXSR receiver
Option5:CrazybeeX PNP V2.2 with External TBS crossfire nano receiver
Happymodel EX1202.5 KV6400 brushless motor 4
Gemfan 3018 bi-blade Propellers(4cw+4ccw) 1
Caddx Ant 1200TVL Global WDR with OSD 2g Ultra Light Nano FPV Camera 1
5.8G 25mw~200mw 40ch vtx (Flight controller built-in) 1
Screw Driver 1
Propeller disassemble tool 1
Happymodel Handbag 1


Spare parts specifications:

Motor Mode: EX1202.5 KV6400
Stator Diamter:12mm
Stator Length:2.5mm
Shaft Diameter:Φ1.5mm
Motor Dimension(Dia.*Len):Φ14mm*14.5mm
No.of Cells(Lipo):1-2S
Propellers Gemfan 3018-2
Center Thickness:5.5mmProp Diameter:76.5mm
Center Hole diameter:1.5mm
Flight controller (Frsky SPI RX version) CRAZYBEEX FR V2.2 FC  Firmware target: CrazybeeF4FR
(Flysky SPI RX version) CRAZYBEEX FS V2.2 FC Firmware target: CrazybeeF4FS
(DSM2/X SPI RX version)CRAZYBEEX DXS V1.0 FC firmware target:CrazybeeF4DXS
(External Frsky RXSR version) CRAZYBEEX PNP V2.2 Firmware target:CrazybeeF4DX
(External TBS CRSF NANO version) CRAZYBEEX PNP V2.2 Firmware target:CrazybeeF4DX
MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
Sensor: MPU-6000(SPI connection)
Board size: 28.5 * 28.5MM
Power supply: 1-2S battery input (DC 2.9V-8.7V)
Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready
Built-in Betaflight OSD(SPI Control)
Built-in 5.8G VTX
Built-in SPI Frsky/Flysky receiver or no receiver
Built-in 5V 1A BEC
Onboard 4in1 ESC MCU upgraded to EFM8BB21
Power supply: 1S LiPo/LiPo HVCurrent: 5A continuous peak 6A (3 seconds)
Support BLHeliSuite programmable
Factory firmware: S_H_50_REV16_7.HEX
Default protocol: DSHOT600
Onboard Frsky SPI D8 receiver Version SPI BUS receiver Frsky D8 compatible
Compatible Non EU transmitter D8 modelChannels: 8ch
Failsafe support
No ground interference ( Transmitter and receiver 1 m from the ground): 200m~300m
Onboard Flysky SPI receiver Version SPI BUS receiver
Protocol: AFHDS and AFHDS-2A Switchable
Channels: 8ch(AFHDS) or 14ch(AFHDS-2A)
No ground interference ( Transmitter and receiver 1 m from the ground): 200~300m
Failsafe support
Onboard DSM2/X SPI receiver Version SPI BUS receiver DSM2/DSMX compatible
Channels: Max 12ch
Failsafe support
No ground interference ( Transmitter and receiver 1 m from the ground): 200m~300m
RSSI enable(show on the goggles)
External Frsky R-XSR receiver version Weight: 1.5g
Number of channels: 16CH (1-16CH from SBUS channel, 1~8CH from CPPM channel)
Operating Voltage Range: 3.5V~10V
Operating Current:70mA@5V
Firmware Upgradable
Compatibility: FrSky X Series modules and radios in D16 mode
Could support Frsky New ACCESS Protocol ( Upgrade firmware)
External TBS CRSF Nano receiver version Original TBS CROSSFIRE Receiver  ,CRSF Protocol , Official TBS transmitter compatible
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
With Race bandSmartaudio ready
Caddx ANT 1200tvl camera Image Sensor: 1/3″ CMOS Sensor
Horizontal Resolution: 1200 TVL
TV System: NTSC or PAL
IMAGE: 4:3
Synchronization: Internal
Electronic Shutter: PAL: 1/50~100,000; NTSC: 1/60~100,000
S/N Ratio : >52dB (AGC OFF)
Video Output: CVBSLens: 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.)

Customer Reviews

Based on 5 reviews
Aadric allan

so fast and sooooo much fun

Corbett Craig
Crux3 - great for all flying levels!!

Great little thing that is responsive and fun to fly, not super hard for beginners and super nimble for experienced flyers too!

Great quad

I got this thing to reenter the fpv quad world. I've been really enjoying the flights. It's fast on 2S but not out of control. Highly recommend.

Kin Lam
capable little 1s,

indoor and outdoor, both capable.

ESC died after 10 flights

The drone flies great and is very efficient (7 minutes of freestyle on a 450 2s). The electronics are quite exposed so I recommend not flying it in wet conditions or conformal coating. They really should provide some mechanism to hold the antennas in place without getting chopped up by the propeller. I got the FrSky SPI receiver and the range is quite bad, it will fall out of the sky with no warning at random when flying just 60 feet away line of sight with no obstructions. Highly recommend getting a dedicated receiver and orienting the antennas appropriately. Unfortunately one of the ESCs died after 10 flights - I did not turtle mode or block the props in anyway. Got a replacement AIO controller board for $50 to give it another shot. I choose this option so I would not have to solder/assemble but I now have to solder on a receiver and repair the drone so I can't say its a durable drone and ended up costing me as much as a higher quality, more durable quad like a diatone or iFlight which I should have gotten instead.