SJCAM SJ4000 4K Action Camera Kit (64GB card, 40MP, 30m waterproof, 170° FOV, EIS) with dual batteries
Product description
The essentials for buying the SJ4000 4K
If you want a practical action camera that’s ready to go straight from the box, the SJCAM SJ4000 4K is built around that kind of day-to-day use: helmets, bikes, motorcycles, and even getting it wet underwater. On paper, it ticks a lot of boxes for a mid-range “sports camera” setup—4K30fps video, 40MP photos, 170° field of view, and electronic stabilisation (EIS).
The big attraction here is the bundle approach. You’re not just getting the camera, you also get two rechargeable 900mAh batteries and a 64GB SD card, which reduces the usual faff of figuring out what you need before you can start filming. That matters if you’re the sort of buyer who wants to mount it, press record, and worry about the fine details later.
That said, it’s not a miracle camera. You’ll want to be mindful of what you’re prioritising—zoom and stabilisation, for example, are useful tools, but footage can still look more “action-focused” than cinematic if your expectations are set high.
What stands out in real use (and why it matters)
The SJ4000 4K is clearly designed for movement-heavy scenarios, including helmet mounting for sports and commuting. A 170° FOV is a strong choice when you want a wide, immersive perspective—useful if you’re filming road runs, bike routes, or the view in front of a rider.
In everyday terms, it’s the combination of gyro/EIS stabilisation and a wide lens that helps smooth out the worst of handheld wobble and fast changes in direction. If you’ve ever watched shaky helmet footage and thought “this could’ve been watchable”, this is the kind of stabilisation feature set that’s meant to help.
There’s also an underwater mode, plus an IP68-rated waterproof case. If you do snorkelling or casual dives, having a dedicated underwater mode and a stated depth rating makes it feel more like a proper “adventure” kit rather than a camera that only pretends it can go underwater.
And yes, Wi‑Fi is included. That’s helpful for connecting to an app workflow, even if you’ll still be learning curves with any action-cam setup.
Key takeaways on footage, photos, and zoom
For video, the camera is set up for 4K30fps recording (with other options mentioned such as 2K 30fps and 1080p 30fps). For stills, it supports 40MP photos.
The lens and framing approach are worth paying attention to. You’re getting a 170° field of view, and the camera also offers 5X zoom (from 1.0X to 5.0X). However, the instructions included with the product highlight an important limitation: the FOV needs to be turned off when using zoom for optimal results.
So the sensible way to think about it is this: if you want maximum wide-angle immersion, keep the FOV on, if you’re zooming in, you may lose some of that wide perspective. It’s not necessarily a deal-breaker, but it’s the sort of setting detail that can catch people out when they first start filming.
If you’re expecting the kind of zoom performance that replaces a proper optical system, you may end up disappointed. For most users, though, 5X zoom is a convenience feature for getting closer framing without changing mounts.
Waterproofing and underwater mode: what you can realistically expect
The SJ4000 4K includes a durable, IP68-rated special waterproof case and an underwater mode. It’s specified for depths up to 30m (98ft).
That’s a fairly clear invitation to use it for underwater filming where you can manage the setup—snorkelling, calmer dives, and the usual “adventure day” scenarios. The underwater mode plus a waterproof case is the difference between taking it in and taking it in confidently.
Still, note that underwater results depend heavily on conditions: light levels, water clarity, and how steady your movement is. Stabilisation helps, but it can’t compensate for murky water or harsh backscatter.
Connectivity and practical setup tips (worth knowing before you buy)
The kit includes Wi‑Fi, and the product notes some practical steps that are genuinely relevant if you’ve ever fought with action-cam apps.
- You’re advised to format the memory card before first use.
- If you have connection issues with the camera app, a simple disconnection and reconnection of your mobile network can help.
- For viewing or downloading content, the instructions suggest connecting the camera directly to a computer.
Also, the included memory card is 64GB, and the product mentions that the storage can be upgraded up to 128GB. That’s useful if you’re planning longer rides or more frequent underwater sessions.
If you like having everything ready to film, this bundle makes sense. If you hate setup steps, the formatting note is one to factor in.
Tech specs (what you’re getting, in straightforward terms)
- Type: Action camera / sports camera
- Resolution / frame rate: 4K30fps video recording
- Photo resolution: 40MP photos
- Stabilisation: EIS stabilisation (gyro-based stabilisation is mentioned)
- Field of view: 170° FOV
- Underwater rating: up to 30m (98ft) with waterproof case
- Waterproof rating: IP68-rated special waterproof case
- Zoom: 5X zoom (1.0X to 5.0X)
- What’s included: two rechargeable 900mAh batteries and a 64GB SD card
Who it’s for (and who should look elsewhere)
It makes sense if you want a helmet or motorcycle/cycling camera with a wide-angle look, stabilisation for movement, and a waterproof case for snorkelling or light diving. You’ll likely appreciate the “ready-to-go” nature of the kit—especially the included 64GB card and dual batteries for longer sessions.
It might not be the best match if you need a camera for advanced, highly controlled filming where you expect consistent premium-level footage across every lighting scenario, or if you’re specifically chasing the most seamless zoom experience (because FOV must be managed when zoom is used).
It’s also worth considering that this is positioned as a sports/adventure option rather than a specialist cinema camera—so if your main goal is professional-grade colour grading and ultra-clean low-light performance, you may find other approaches fit better.
Mini FAQ
Is the SJ4000 4K ready to use straight away?
The kit is described as ready-to-go, and it includes two rechargeable batteries plus a 64GB SD card, which removes a common buying step.
Can it go underwater without any extra shopping?
It comes with an IP68-rated waterproof case and an underwater mode, and it’s rated up to 30m (98ft) with the case.
Does zoom work with the 170° field of view?
The included notes state that FOV must be turned off when using zoom for optimal results.
What should I do if the app won’t connect?
The guidance suggests disconnecting and reconnecting your mobile network, which is a simple first troubleshooting step.
Is Wi‑Fi included?
Yes, built-in Wi‑Fi is mentioned, which supports app connectivity.
When it makes sense
Buy the SJCAM SJ4000 4K action camera kit if you want a versatile, adventure-ready setup with wide-angle 170° viewing, EIS stabilisation for motion, and a waterproof case rated for up to 30m—plus dual batteries and a 64GB card so you can start filming without delay.
Avoid it if your priority is a “set and forget” shooting style where zoom and framing settings never need attention, or if you’re after consistently premium results in every scenario, because this sits firmly in the practical sports-camera bracket rather than the specialist top end.