SJCAM C400
Budget action
~$229

SJCAM

SJCAM C400

A 54 g camera module that drops into a handle carrying a 3000 mAh battery and a big rotating screen — the same split-body idea as the DJI Osmo Nano and Insta360 GO Ultra, executed for well under their price. Seven hours and seventeen minutes at 4K30 with the handle attached is the number SJCAM leads with, and only its own SJ30 comes close. What it does not have is the sensor those two carry: 1/2.8-inch against their 1/1.3-inch and 1/1.28-inch, a quarter of the imaging area, which is the whole difference in low light. Nor is there bare waterproofing. Read this as a very long-running vlogging camera rather than a small flagship.

Approx. price
~$229
No plan sold
Sensor area
18 mm²
1/2.8-inch
Max resolution
4K @ 30fps
Claimed runtime
7 h 17 min
4K30 with the 3000 mAh handle attached; 172 minutes on the 54 g camera alone

Sensor area against the rest of the catalogue

18 mm²

Derived from the standard optical-format table rather than copied off a spec sheet, because makers print a fraction that hides it. The table and the arithmetic.

Battery, with the small print

Maker’s claim
7 h 17 min at 4K30 with the 3000 mAh handle attached; 172 minutes on the 54 g camera alone
Third-party test
None collected. We publish a tested figure only where a named outlet has run one and stated its conditions.

Specifications

Budget action
1/2.8-inch
4K @ 30fps
Not published
Not published
6-axis gyro EIS
Field of view
154°
Photo resolution
16 MP
30 m in the case only
1250 mAh
Weight
54 g
Dimensions
68×32×25.5 mm
Screens
Rotating screen on the handle
GoPro folding fingers
GPS
No
Voice control
No
Storage
microSD
Model
C400
Released
2025

Features

  • ●54 g camera module that docks into a handle
  • ●437 minutes at 4K30 with the handle; 172 minutes on the module alone
  • ●Large rotating screen on the handle
  • ●4K30, 2K60 and 1080p120
  • ●Six-axis gyro stabilisation
  • ●Case rated to 30 m
Flip screenGoPro fingersNo plan needed

Strengths

  • +Over seven hours at 4K30 with the handle, the longest figure in this catalogue
  • +54 g module is lighter than a GoPro HERO and close to an Insta360 GO 3S
  • +Rotating screen makes it usable for talking to camera
  • +About half the price of the Insta360 GO Ultra it copies, and well under the DJI Osmo Nano
  • +The camera module drops into the handle without a cable, so the changeover takes seconds

Drawbacks

  • −1/2.8-inch sensor — a quarter of the Osmo Nano's imaging area
  • −No bare waterproofing at all
  • −4K30 only, no horizon lock, no log profile
  • −The module has no screen of its own; framing needs the handle

The strengths and drawbacks above are drawn from the manufacturer’s specifications and published reviews. No body of owner reports for this camera has been read, so nothing here claims to speak for its owners.

What owners say

No owner discussion has been collected for the SJCAM C400 yet. The pros and cons above come from the manufacturer’s specifications and published reviews. Rather than fill this space with invented sentiment, it stays empty until there is something real to put in it.

Cameras people look at alongside it

More from SJCAM →
SJCAM SJ20 Dual Lens
~$229
Budget action

Two lenses on the front, and neither of them is for 360 capture. One is an f/2.0 daylight lens; the other is an f/1.3 night lens, and the camera switches between them. It and the newer SJ30 are the only cameras in this catalogue that answer low light with a second, faster lens rather than a bigger sensor or noise reduction, and for night riding or filming from a car that is a genuinely different answer. The cost shows up everywhere else: each lens sits on a small 1/2.8-inch sensor, 4K stops at 30 fps, the bitrate is 25 Mbps — the lowest figure in this catalogue, and low enough that fast motion visibly falls apart — and there is no horizon lock. It did surprise on endurance: in road.cc's four-camera drain test it stopped within three minutes of the DJI Osmo Action 5 Pro, about half an hour after the Insta360 Ace Pro 2.

18 mm²
4K @ 30fps
Best for: Night riding, where a fast lens beats a bigger sensor
Full spec sheet
SJCAM SJ11 Active
~$189
Budget action

SJCAM has been building GoPro-shaped cameras longer than most of the brands that undercut it, and the SJ11 Active is its mainstream model: a Sony sensor behind an Ambarella processor, dual screens, 5 m of bare waterproofing and 30 m in the case. At roughly 18 mm² its sensor is among the smallest in this catalogue, which matters more than the 20 MP on the box. Where it does well is the dual-screen layout and a 4K30 image that holds together in daylight. Slow motion is 1080p120, there is no horizon lock, and SJCAM rates the 1300 mAh battery at 100 minutes of 4K30.

18 mm²
4K @ 30fps5 m bare
Best for: A dual-screen budget camera from an established maker
Full spec sheet
SJCAM SJ30
~$259
Budget action

SJCAM carried the SJ20's two-lens idea forward and gave each lens its own sensor and processing path — a 1/2-inch daylight sensor, and a 1/1.8-inch starlight sensor behind an f/1.8 lens for night — which is a more serious piece of engineering than the price suggests. The headline is 8K, and the honest reading of it is 8K at 20 fps — below the 24 fps that reads as motion, so it is a stills-adjacent mode rather than a usable video one; 4K60 is the real ceiling. What is unambiguously good is endurance: a 2000 mAh internal cell plus a 4200 mAh power handle gives a claimed seven hours at 4K30, which only SJCAM's own C400 beats here. Horizon lock is the 45-degree kind, which corrects lean but not rotation.

31 mm²
8K @ 20fps5 m bare
Best for: All-day recording where runtime beats resolution
Full spec sheet