Sub250 DollyFly16 HD O4 Pro
Sub250
Sub250's 2S with O4 Pro 4K recording
An 85mm 2S cinewhoop from Sub250 that packs the full DJI O4 Air Unit Pro — 4K/120fps recording with RockSteady stabilization — into one of the smallest ducted airframes, built for indoor and small-scene cinematic flying.
Retailer pricing for the complete package runs well above Sub250's direct pricing; direct orders ship DHL/UPS from China with a 10-15 day transit time and import duties charged to the buyer.
WTFPV variants omit the O4 Air Unit Pro and sell for a fraction of the complete-package price — an option for pilots who already own an O4 Pro unit.
The press-on Gemfan props can eject during turtle-mode recoveries.
The injection-molded ducted frame parts are flexible and develop visible stress points and wear with regular use.
The full story
Released August 2025, the DollyFly16 is built around the full DJI O4 Air Unit Pro rather than the Lite unit: 4K/120fps onboard recording, a 1/1.3-inch sensor, and RockSteady stabilization. The camera rides on a rubber-damped, tilt-adjustable mount with an included ND8 filter and protective housing. The whole aircraft weighs 88g dry and roughly 120g all-up on the recommended 2S pack.
Underneath, a GEPRC Taker F411 12A — STM32F411 processor, ICM42688-P gyro, Bluejay 12A — drives Sub250 1103 14000KV motors on Gemfan 1636-4 props, all mounted to a 2mm carbon plate with injection-molded prop guards. It ships either or with a serial 2.4GHz (ELRS 3.0) receiver, and the AIO carries 16MB of blackbox flash plus Betaflight OSD for tuning and troubleshooting.
In the air it is aimed at indoor and small-scene cinematic work, with ducts and a camera housing that protect bystanders and the lens in crashes. Outdoors, RockSteady footage stays smooth in wind that visibly shakes the live goggle feed, though the rubber camera mount shows some jiggle at higher speeds and in crosswind. Reviews measured roughly 3:30-3:45 of indoor cruise against the vendor's ~4min claim.
Sub250 sells it direct in PNP and ELRS versions, plus WTFPV variants that omit the air unit for pilots transplanting an O4 Pro they already own; Pyrodrone also carries it. The kit is generous: spare protective frame, extra props, damping balls, the ND8 filter, standoffs, and a full micro tool set. The recommended 2S 530mAh battery is not included.
Pros & cons
Pros
- Full DJI O4 Air Unit Pro (not the Lite unit) in one of the smallest ducted airframes available: 4K/120fps onboard recording, 1/1.3-inch sensor, and RockSteady stabilization at 88g dry
- RockSteady onboard footage stays smooth in wind that visibly shakes the live goggle feed, making usable cinematic shots possible outdoors as well as indoors
- Rubber-damped, tilt-adjustable camera mount plus included ND8 filter and camera protection housing are purpose-built for cinematic capture
Show all 8 pros
- UART serial ELRS 2.4GHz (ELRS 3.0) receiver on the current Taker F411-12A-E board, avoiding the dead-end ELRS used on older Sub250 whoops
- WTFPV variants let you transplant an O4 Pro unit you already own instead of paying full price for the complete package
- Injection-molded ducts and camera housing protect bystanders and the lens during indoor crashes
- Generous kit: spare protective frame, extra props, damping balls, ND8, standoffs, and a full micro tool set in the box
- 16MB blackbox flash and Betaflight OSD on the AIO make tuning and troubleshooting straightforward
Cons
- Rubber-mounted camera shows visible jiggle in the feed at higher speeds and in crosswind
- Press-on Gemfan props can eject during turtle-mode recoveries
- Motors are soldered directly to the AIO, making field motor swaps difficult
Show all 8 cons
- Injection-molded ducted frame parts are flexible and show visible stress points/wear after regular use
- Real-world flight time is short: reviews measured ~3:30-3:45 indoor cruise vs the vendor's ~4min claim
- Props produce a noticeable whistle indoors at certain throttle ranges
- Expensive as a complete package, and notably more from retail than direct (direct orders ship from China, 10-15 days, duties on buyer)
- Recommended LiHV 2S 530mAh battery is not included
Specs
Retailers & price history
| Retailer | Current | Stock | Lowest confirmed | Highest confirmed | Checked |
|---|---|---|---|---|---|
| Sub250 (direct) | $379.99 | In stock | $379.99 (2026-07-02) | $379.99 (2026-07-02) | 2026-07-04 |
| Pyrodrone | $492.99 | Sold out | $492.99 (2026-07-02) | $492.99 (2026-07-02) | 2026-07-04 |
Current = cheapest ready-to-fly configuration (video system included, ELRS) tracked at that retailer; sold-out rows show the last listed price. Lowest/highest are from every confirmed scan since 2026-07-02 — the log grows with each stock check.
Replacement parts & batteries
Crash spares that fit this model, checked against the shops like everything else. Batteries show three price tiers — $ lowest, $$ middle, $$$ highest — among compatible in-stock packs.
Batteries
| Part | Price | Availability |
|---|---|---|
| Tattu 2S 450mAh 95C LiHV (Long Type, XT30) $ 2S 450mAh 95C LiHV · XT30 · 62.5×16.2×14.7mm long pack · JST-XH balance |
$7.99 | In stock at Pyrodrone |
| Gaoneng GNB 2S 530mAh 90C LiHV (Long Type, XT30) $$ 2S 530mAh 90C LiHV · XT30 · 26g · 13×17×64mm long pack |
$10.99 | In stock at RaceDayQuads |
| Flywoo Explorer 2S 550mAh 80C LiHV (2-pack, XT30UP) $$$ 2S 550mAh 80C LiHV · XT30UP (XT30-compatible Amass-sheath pigtail) · sold as 2-pack |
$20.99 | In stock at Flywoo (direct) |
Props
| Part | Price | Availability |
|---|---|---|
| Gemfan 1636 40mm Quad-Blade Props (1.5mm shaft) Gemfan 1636 40mm quad-blade · 1.5mm shaft · PC · 8 props |
$3.00 | In stock at Sub250 (direct) |
Motors
| Part | Price | Availability |
|---|---|---|
| Sub250 1103 14000KV Motor 1103 14000KV · 2S · single or 4 pack |
$9.99 | In stock at Sub250 (direct) |
Frames
| Part | Price | Availability |
|---|---|---|
| DollyFly16 HD O4 Pro Frame Parts Full frame $19.99 or individual spares: prop-guard rings, carbon plate, O4 protective frame, hardware, shock balls |
$3.00 | In stock at Sub250 (direct) |
Video
| Part | Price | Availability |
|---|---|---|
| DJI O4 Air Unit Pro DJI O4 Air Unit Pro · 1/1.3" sensor · 4K/120 · 155° FOV · dual antenna |
$249.00 | In stock at Sub250 (direct) |
Chargers
| Part | Price | Availability |
|---|---|---|
| Flywoo EasyPower E24 2S Battery Charger EasyPower E24 · Flywoo's OEM 2S charger for Explorer XT30UP packs (E16/E24 listing; E24 = 2S model) |
$29.99 | In stock at Flywoo (direct) |
| ToolkitRC M450 50W Mini Balance Charger (2S-4S) 50W 5A mini balance charger · charges 2S packs via their JST-XH balance lead (the standard on all XT30 2S whoop packs) |
$47.99 | In stock at RaceDayQuads |
Other spares
| Part | Price | Availability |
|---|---|---|
| DJI O4 Pro Coaxial Antenna Cable Replacement antenna coax for O4 Air Unit Pro · 6/9/17.5/20cm lengths |
$12.99 | In stock at Sub250 (direct) |