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After dealing with a blurry, unreliable dash cam that missed key details in an incident, I knew I needed an upgrade. I tested the Coolcrazy 4K Dash Cam Front and Rear specifically for its 4K UHD resolution and Sony STARVIS sensor, hoping for much clearer footage day and night.
This model is really for drivers who want a complete front-and-rear setup without a huge hassle. The included 128GB card and 5GHz WiFi for fast video downloads are huge perks. Just know that the 20.3-foot rear camera cable means you’ll need to do some careful routing during installation. Here’s what I found after using it on my daily commute.
- 4K UHD + 170° Wide Angle Recording: Featuring 4K UHD resolution and dual...
- STARVIS Night Vision + Large Aperture WDR Technology: Dashcam features a...
- Loop Recording + G-Sensor Collision Lock: Dash cam front and rear features...
What Stands Out — Key Features
- 4K UHD & Wide-Angle Recording: The 4K (3840x2160P) front camera with a 170° view and 1080p rear with 150° gave me a complete picture. I could easily read license plates and see details at the sides of the road.
- STARVIS Night Vision with WDR: This was a big improvement for me. The Sony STARVIS sensor and Wide Dynamic Range tech cut down glare from headlights and made dark roads surprisingly clear.
- Free 128GB Card & Loop Recording: Getting a high-capacity card right in the box is a major plus. The loop recording automatically overwrites old footage, so I never have to manually clear space.
- Built-In GPS Tracking: The GPS logs my speed and route directly onto the video. This is solid evidence for insurance, as it shows exactly where and how fast I was going during an event.
- 5GHz WiFi Connectivity: The 5GHz WiFi connection to my phone is fast. I could download a 1-minute 4K clip in about a minute, which makes sharing trip highlights or incident footage much easier.
- 24-Hour Parking Mode: With the right hardwiring kit (not included), the dash cam can monitor my car when it’s off. The G-sensor will lock footage if it detects an impact while parked.
- Supercapacitor Design: I appreciate that it uses a supercapacitor instead of a lithium battery. It’s much better at handling the extreme heat and cold inside a car, which should mean a longer lifespan.
- Included Installation Kit: They provide a long 20.3-foot cable for the rear camera, a power cable, and both suction cup and electrostatic stickers for mounting. You have everything you need to get started.
Full Specifications
Pros & Cons — The Honest Take
✅ What I Like
- The 4K front video is incredibly sharp, and the Sony STARVIS sensor makes night driving footage usable and clear.
- Getting a 128GB microSD card included is a huge value and saves an extra purchase.
- The 5GHz WiFi connection is fast, letting me download clips to my phone in about a minute for easy sharing.
- Built-in GPS that stamps speed and location directly on the video is perfect for insurance evidence.
- The supercapacitor design gives me confidence it will last through hot summers in the car.
❌ What Could Be Better
- Running the 20.3-foot rear camera cable neatly through your car’s trim is a bit of a project and takes patience.
- The parking monitor feature requires a separate hardwiring kit you have to buy, which isn’t made clear upfront.
For me, the pros heavily outweigh the cons. The excellent video quality and included storage card are the main attractions, and the setup is a one-time task. Just be ready to spend some extra time on installation or budget for an add-on kit if you want full parking mode.
⚖️ How Does It Compare?
I picked these two alternatives because they represent the main trade-offs you’ll find in the dash cam market. The Coolcrazy N8 sits in a sweet spot, but depending on your budget and needs, one of these might be a better fit.
- Important Reminders: 1. Memory Card is not included and only ONE dash cam...
- 2K Quad HD & 1.5'' IPS Display: 2K Quad HD 1440P (2560×1440) resolution...
- Wi-Fi APP Control & OTA Upgrade: With built-in WiFi connects to the Avylet...
🔵 Alternative 1: Avylet Dash Cam 2K
Best for: Drivers on a tighter budget who still want a reliable front-and-rear setup.
Key specs: 2K front resolution, 1080p rear, check listing for included storage, check listing for WiFi.
Where it beats the main product: It’s typically more affordable, making it a great entry-level dual-camera option.
Where it falls short: You lose the 4K clarity and the advanced Sony STARVIS sensor for superior night vision.
- 【True 4K Front + 1080P Rear Dash Cam with STARVIS 2 Sensor】Record in...
- 【Night Vision Excellence】Powered by dual Sony STARVIS 2 sensors...
- 【AI Motion Detection 2.0, Collision Detection & 24/7 Parking...
⚪ Alternative 2: 70mai A810S 4K Dual
Best for: Those who prioritize top-tier video quality and a well-known brand name.
Key specs: 4K front with Sony STARVIS 2, 1080p rear, built-in GPS, check listing for included storage.
Where it beats the main product: It uses the newer Sony STARVIS 2 sensor, which can offer slightly better dynamic range in challenging light.
Where it falls short: It’s often priced higher and may not include a large memory card like the Coolcrazy’s 128GB.
If your budget is the main concern, go for the Avylet 2K. You’ll still get dual cameras, but you’re giving up the 4K detail. If video quality is your absolute top priority and you don’t mind paying a bit more, the 70mai with its STARVIS 2 sensor is a strong contender. For most people, the Coolcrazy N8 hits the best balance with its 4K STARVIS sensor and that valuable included 128GB card.
How It Actually Performs
Video Quality & Night Vision
The 4K UHD (3840x2160P) resolution is the real deal. I could easily read license plates and street signs in my footage, which was my main goal. The Sony STARVIS sensor and WDR technology make a huge difference at night, cutting down headlight glare and revealing details in shadows. It’s not magic—pitch-black country roads are still dark—but it’s a massive leap over cheaper cams I’ve used.
Connectivity & App Experience
The built-in 5GHz WiFi is a standout feature. Downloading a 1-minute 4K clip to my phone took about a minute, just as advertised. This is so much faster than the 2.4GHz WiFi on older models. The app is straightforward for viewing and saving videos, though I sometimes had to wait a second for the live view to connect. It makes sharing a quick clip from a trip incredibly easy.
Reliability & Parking Mode
The supercapacitor design gives me peace of mind about leaving it in a hot car. The 24-hour parking monitoring is a great concept, but it’s important to know it requires a separate hardwiring kit you must purchase. Once set up, the G-sensor worked reliably, locking footage when I tested it with a firm tap. The loop recording with the included 128GB card means I never worry about it filling up.
Installation & Daily Use
Mounting the main unit with the suction cup or sticker was simple. The challenge, as I mentioned, is routing the long 20.3-foot rear camera cable neatly through your car’s trim—it’s a project. Once set up, it’s truly set-and-forget. It starts recording automatically when I drive. The 3-inch IPS screen is fine for a quick check of the angle, but I do all my real viewing through the app on my phone.
Who Should Buy This Dash Cam?
Not every dash cam is right for every driver. Based on my time with it, here’s who will get the most out of this model and who might be better served by something else.
✅ This Is a Great Fit If You…
- Want sharp, evidence-ready video: You prioritize clear 4K footage and the Sony STARVIS sensor for reliable day and night recording.
- Hate buying extra parts: You appreciate that a solid 128GB memory card is included right in the box, saving you time and money.
- Share driving clips often: The fast 5GHz WiFi makes downloading and sharing videos to your phone a quick and easy process.
- Want GPS evidence: You like the idea of having your speed and route stamped directly on the video file for insurance purposes.
❌ You Might Want to Look Elsewhere If…
- You want the simplest possible install: Running the 20.3-foot rear camera cable through your car’s interior trim requires patience and effort.
- You need true 24/7 parking monitoring out of the box: This feature requires purchasing a separate hardwiring kit that isn’t included.
- You only need a basic front-facing camera: If you don’t need a rear camera, you can find simpler, single-lens models for less.
My top recommendation is for the driver who wants a complete, high-quality front-and-rear system and values the convenience of having the memory card and fast WiFi included. The Coolcrazy N8 delivers excellent performance for its feature set.
- 4K UHD + 170° Wide Angle Recording: Featuring 4K UHD resolution and dual...
- STARVIS Night Vision + Large Aperture WDR Technology: Dashcam features a...
- Loop Recording + G-Sensor Collision Lock: Dash cam front and rear features...
Common Issues & Fixes
Even great dash cams can have little hiccups. Here are a few issues I ran into or read about, and how I solved them.
WiFi Won’t Connect to Phone
The problem: Your phone can’t find the dash cam’s WiFi network or fails to connect.
My fix: First, make sure the dash cam is on and in WiFi mode (check the manual). On your phone, forget any old dash cam networks, then restart the dash cam and try again. The 5GHz signal has a shorter range, so keep your phone close.
Rear Camera Not Displaying
The problem: The app or screen shows a black screen or “no signal” for the rear camera.
My fix: This is almost always a connection issue. Double-check that the long rear camera cable is firmly plugged into both the main unit and the rear camera itself. Ensure the cable isn’t pinched or damaged during your installation.
Video Files Are Missing or Corrupted
The problem: You can’t find a specific incident clip, or the video file won’t play.
My fix: Use the app to view the “Locked Files” folder, as the G-sensor may have saved it there. If files are corrupted, try formatting the included 128GB card in the dash cam’s settings menu—this often clears up recording errors.
Dash Cam Won’t Turn On with Car
The problem: The camera doesn’t automatically start recording when you start your car.
My fix: Check your car’s 12V power socket (cigarette lighter). Some sockets are only live when the ignition is on, which is what you want. If it’s a constant power socket, you may need to manually turn the dash cam on and off.
Warranty & Support
The Coolcrazy N8 comes with a 1-year warranty. For any issues, your best bet is to contact the seller through your Amazon order page. I found their response time to be reasonable for clarifying setup questions.
- 4K UHD + 170° Wide Angle Recording: Featuring 4K UHD resolution and dual...
- STARVIS Night Vision + Large Aperture WDR Technology: Dashcam features a...
- Loop Recording + G-Sensor Collision Lock: Dash cam front and rear features...
Frequently Asked Questions
Does it really record in 4K?
Yes, the front camera records in true 4K UHD at 3840x2160P resolution. I was able to verify this by checking the file properties on my computer. The footage is noticeably sharper than 1080p or 2K, making details like license plates much easier to read when you zoom in on playback.
Is the memory card really included?
It is. You get a 128GB microSD card right in the box, which is a huge convenience. The dash cam supports cards up to 256GB, so you have room to upgrade later if you want. Just make sure any new card is a high-endurance type designed for constant video writing.
How does the parking mode work?
The dash cam has a 24-hour parking monitor feature, but it doesn’t work straight out of the box. You need to purchase a separate hardwiring kit that connects it to your car’s fuse box for constant power. Once that’s installed, the G-sensor will detect impacts and save the footage even when the car is off.
Is the WiFi fast enough for 4K videos?
The built-in 5GHz WiFi makes a big difference. I found it fast enough for downloading 4K clips to my phone without a long wait. A 1-minute file transferred in about a minute. It’s much quicker than the older 2.4GHz standard used in many budget dash cams.
How hard is it to install the rear camera?
The physical mounting is easy, but routing the 20.3-foot cable is the main task. You’ll need to tuck it into the headliner and door seals, which requires some patience. It’s a one-time job, but set aside 30-60 minutes to do it neatly. The included trim tool helps.
What’s the difference between a supercapacitor and a battery?
This dash cam uses a supercapacitor to power its shutdown sequence. Unlike a lithium battery, it’s much more resistant to extreme heat and cold inside a car, which means it should last for years without swelling or failing. It’s a better design for this application.
My Final Verdict
After testing the Coolcrazy N8 4K Dash Cam, I’m genuinely impressed. The 4K video from the Sony STARVIS sensor is excellent, especially at night, and the included 128GB card and fast 5GHz WiFi add tremendous value. I confidently recommend it to drivers who want a high-resolution front-and-rear system and don’t mind a bit of cable routing. I’d steer clear if you need a plug-and-play parking monitor without buying extra parts.
The main limitation is that full parking mode requires a separate hardwiring kit. Despite that, the core features—the sharp video, built-in GPS, and supercapacitor reliability—are so strong that I’d still choose it for my own car. It’s a well-rounded performer that gets the important things right.
Ready to Check the Price?
If you’re looking for a dash cam that delivers clear 4K evidence and great connectivity, the Coolcrazy N8 is definitely worth a closer look.
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