SJCAM SJ4000 Upgraded 4K30FPS Action Camera - Dual Screen, Waterproof

In this review of the SJCAM SJ4000 Upgraded action camera, the bottom line is simple: this is a budget-friendly, versatile sports camera for casual adventurers who want solid footage without a big price tag. The reviewer found it especially useful for water sports and helmet or dash mounting thanks to the IP68 waterproof case and 170 degree wide-angle lens. Its biggest selling point is the combination of multiple resolutions up to 4K30fps with a convenient dual-screen layout that makes selfies and framing quick and intuitive.

Key Features

• 4K and multiple resolutions: Shooting at 4K30fps, 2.7K30fps, 1080P up to 60fps and 720P120fps gives flexible frame-rate and quality options for different activities.
• 170 degree wide-angle lens: The super wide field of view captures more of the scene, useful for action sports and helmet-mounted footage.
• IP68 waterproof case: The included durable case allows diving to 98ft/30m so users can record snorkeling, diving and surfing without worry.
• Dual color screens: A front color screen for selfies and a rear 2-in HD screen for live preview and menu navigation make framing and playback easier.
• WiFi and app control: Built-in WiFi connects to the SJCAM Zone app for remote control, quick transfer and fast uploading to social platforms within the WiFi range.
• Multiple shooting modes: Loop recording, time-lapse, burst shooting and exposure adjustments add creative and practical options for riding, driving or vlogging.

Who It's For

The SJ4000 is aimed at budget-conscious outdoor enthusiasts, amateur vloggers and anyone who wants a compact action camera for water sports, motorcycle helmet rigs, dashcam use or casual underwater shooting. Its waterproof case, wide-angle lens and convenient mounts make it a natural fit for swimmers, snorkelers and riders who need durable mounting and easy framing.

Those who need pro-level stabilization, studio-grade audio or the absolute maximum battery runtime should look elsewhere; customers report mixed battery life and limited onboard audio quality, so serious filmmakers or users who require long continuous shooting per battery may prefer higher-end models.

Pros & Cons

Pros

• Good image flexibility with up to 4K30fps and several other resolution/frame-rate choices.
• Waterproof to 98ft/30m with the supplied case, making it ready for most recreational diving and water sports.
• Dual screens simplify selfies and live preview, helpful for helmet or handheld shooting.
• Strong value for the feature set and included accessories like two batteries and a 32G card.

Cons

• Audio quality is limited compared with dedicated microphones and may not satisfy users focused on sound.
• Battery life varies by report, with some users getting short runs per battery depending on settings and resolution.

Specifications

Our Verdict

The SJCAM SJ4000 Upgraded is a practical, cost-effective action camera for casual adventurers who want a waterproof, wide-angle shooter with flexible resolution options and handy dual screens. It represents solid value when you factor in the underwater case, extra battery and 32G card; buy it if you prioritize portability and versatility over pro audio or maximum battery runtime.

Frequently Asked Questions

Can this camera be used underwater?
Yes, the camera works underwater when placed inside the included IP68 waterproof case, rated to 98ft/30m for recreational diving.

Does it connect to a phone for remote control?
Yes, the SJ4000 uses WiFi and the SJCAM Zone app for remote control, preview and media transfer within the stated WiFi range.

How long do the batteries last?
Battery life varies by resolution and settings; customers report runs ranging from under an hour to a few hours per battery, so carrying the included spare is recommended.