itsFPV ERA 3.5-Inch Mini O4 Frame Kit
A basketball hoop. On a 5-inch, you fly around it. At 3.5 inches, you fly through it. FPV feels different when you're this small and this durable. Every gap becomes a line. Every line becomes possible.
This is the O4 Pro Version. Same ERA Mini. Same durability. Built specifically for the DJI O4 Pro camera with stock plastic housing. The larger O4 Pro camera required a redesigned cage and extended bottom plate front. Everything else stays the same.
Full ERA, Compressed
This isn't a stripped-down mini version. It's the complete ERA design philosophy: proven camera protection, compressed X geometry, split deck construction. Scaled to 3.5 inches with zero compromises. Everything that made ERA work, tightened up.
The Cage: Why Injection-Molded Nylon?
The visual signature of the ERA is also its functional core. We don't use aluminum (too rigid) or 3D printing (too weak) for our camera protection. We invested in high-pressure injection molding because our testing proved it superior to every other method. 3D printing creates layers, microscopic weak points where cracks eventually start. Injection molding creates a solid, uniform polymer structure with equal strength in all directions.
Why nylon? It's the same polymer family used in downhill mountain bike pedals and high-end snowboard bindings. Parts that survive thousands of vibration cycles and high-velocity impacts without snapping. TPU is more elastic, carbon is stiffer and can chip on sharp impacts. Nylon sits in between: structural memory to take a hit and keep your camera exactly where you set it. It absorbs impact energy, flexes, and bounces back. It sacrifices itself so your electronics don't have to.
Beyond protection, this solid cage acts as a structural bridge. Combined with our split deck construction, the entire chassis becomes one unified, stiff block that withstands abuse.
The worst cage we've ever seen. One year of bashing by team pilot @scarce_fpv. Still functional.
Action Camera Mounting System
We fly 20°. That's why it's the stock angle. Five mounts available from 10° to 30° in 5° steps. One M3 screw out, swap the mount, done. The cage stays untouched.
Your FPV camera is separate and fully adjustable from 0° to roughly 40°.
The cage supports action cams, but at 3.5" the extra weight changes the flight characteristics significantly. If you want to fly with an action cam, we recommend our extended 4" arm set for better balance and more thrust.
Built Like a Shrunken 5-Inch
Around 300g AUW fully built. Light enough for precision, heavy enough for momentum. The compressed X geometry that made ERA responsive feels even tighter at this scale. Same authority, smaller package.
Bonus: With arms this short, zero props in frame on O4 Pro. Clean footage, every flight.
Hardware You'd Spec Yourself
We build what we fly. That means T700/T800 carbon mix. 12.9 hardened YFS screws that won't strip. 7075 aluminum standoffs that won't bend. 22mm deck height (up from ERA's 20mm) for easier installation without sacrificing rigidity.
Small detail that matters: TPU strap holder locks your battery straps in place between packs. No more loose straps slipping during swaps.
Construction
Arms lock into the frame with a form fit. No slop, no play. The bottom plate is under tension from the center screw, adding stiffness without weight.
Need to access your stack? Leave the camera attached. Four screws out, top plate off, full access. Nothing to realign when you're done.
Every cage is checked by hand. Heat inserts installed with specialized equipment. No batch leaves without personal QA.
Choose Your Version
- ERA 3.5" Mini Frame Kit - Analog and DJI V1/O3/O4 Pro CNC Kit
- ERA 3.5" Mini Frame Kit O4 - DJI O4 Pro with standard camera housing
What's Different on the O4 Version
- O4 Nylon Camera Cage: Redesigned for the larger DJI O4 Pro camera. Same injection molding process, same durability.
- Extended Bottom Plate Front O4: Longer carbon plate to match the O4 cage dimensions.
- Updated 3D Prints: O4 VTX Dual Antenna Holder, new TPU camera inserts.
What You're Getting
A frame that won't break in normal freestyle. Camera protection that actually protects. Hardware that won't strip, bend, or fail. A build experience that doesn't fight you. A quad that flies like it should.
Developed by pilots who crash, rebuild, and fly the next day. Every detail comes from real sessions, real crashes, real frustration with how things used to work.
Specifications:
- Standoffs: 7075 Aluminum
- Frame Geometry: Compressed X
- Hardware: 12.9 Hardened Steel
- Prop Clearance: Fits up to 3.6" Props
- Wheelbase: 168mm
- Stack Mounting: M2 25.5x25.5mm | M3/M2 20x20mm
- Motor Mounting: M2 12x12mm
- Camera Mounting: Up to 20x20mm
- VTX Mounting: 20x20mm | 25.5x25.5mm
- Carbon: T700/T800 | Up to 55% Stronger Than Typical FPV Frames
- Camera Cage: Injection-molded Nylon | Absorbs Impact Energy
- Battery Straps: Nylon-Kevlar | Won't Snap on Impact
- LiPo Pad: Super Sticky | Keeps Battery In Place
- Action Camera Angle: Fixed 20° (Adjustable Via Mounts 10-30°) | One M3 Screw
- Motor Bell Protection: Three Point Motor Bell Protection
- Skids: FDM Printed | Protects Arms On Landing
- Arm Swap: One Screw Arm Swap
- Action Cam Swap: One Screw Action Camera Swap
Includes:
1x itsFPV ERA 3.5-Inch Mini O4 Frame Kit
Injection-Molded
- 1x Nyong Freestyle Camera Cage
Carbon Fiber
- 1x O4 Mini Bottom Plate Front
- 1x Mini Bottom Plate Back
- 4x Mini Arm CF 4mm T700
- 1x Mini Top Plate CF 2mm T800
- 1x Mini Interlock CF T700
3D Printed
- 4x O4 TPU Camera Inserts
- 1x AWG14 + 1x AWG16 Lead Holder
- 1x O4 Dual VTS Antenna Holder
- 1x Mini Battery Strap Holder
- 1x ERA VTX Antenna Holder
- 4x ERA Mini Mounting Inserts (M3-M2)
Hardware
- 2x 22mm Standoffs 7075
1x Hardware Set
Miscellaneous
- 1x Mini Ultra Sticky LiPo Pad
- 2x Nylon-Kevlar Battery Straps
- 4x Mini Skids
