The complete guide
How to Choose a Front and Rear Dash Cam That Actually Helps You
The problem nobody thinks about until it happens
You are stopped at lights. Someone taps your rear bumper. You get out, they get out, and within thirty seconds the story has changed. They were barely moving. You rolled back. There is no damage anyway, until the claim arrives three weeks later.
That is the moment people wish they had a camera. Not for dramatic crash footage, but for the small, murky, two-versions-of-events incidents that make up most road disputes. Insurers deal with these every day, and without footage they fall back on split liability, which costs you an excess and a no-claims discount you spent years building.
A dash camera recorder solves a narrow problem very well. It gives you a timestamped, uninterested account of what happened. That is all. It will not stop the collision. It will stop the argument afterwards.
Why two cameras instead of one
Single-lens dash cams are cheaper and simpler, and for a lot of drivers they are enough. But look at where incidents actually happen. Rear-end collisions are one of the most common claim types on the road, and a forward-facing camera records none of it. You get a nice view of the empty road ahead while someone drives into the back of you.
A front and rear dash cam closes that gap. This CHORTAU unit pairs a 2K front camera with a 1080P rear camera, both running at the same time from the one system. The front gets the higher resolution because that is where the most detail is needed, with number plates, signals and lane positions all mattering. The rear camera's job is simpler, showing you who was behind, how close, and how fast.
If you park on the street, drive in heavy city traffic, or spend time in car parks, that second camera earns its keep quickly.
What the 170 degree view actually gives you
Field of view is one of the most misunderstood numbers in this category. A narrow lens gives you a sharp, detailed view of a small slice of road. A very wide lens takes in everything but stretches objects at the edges and shrinks distant detail.
At 170 degrees, the front lens here sits in the useful range. It covers multiple lanes, which matters at intersections and on multi-lane roads where the car that causes the problem is not the one in front of you. It also picks up the kerb, pedestrians stepping off, and vehicles merging from the side.
Pair that width with 2K resolution and you keep enough pixels in the middle of the frame to read a plate at a reasonable distance. Width without resolution is just a blurry panorama.
Loop recording, G-sensors and why files disappear
Every dash cam uses loop recording. The camera chops footage into short clips, and when the memory card fills, it starts writing over the oldest clip. This is a feature, not a flaw. It means the camera never stops because the card is full, and you never have to manage files.
The catch is obvious. If an incident happens and you do nothing, that footage will eventually be overwritten. How long you have depends on your card size and resolution, but it can be a matter of hours on a small card.
The G-sensor is the answer. It watches for sudden motion changes. When something crosses the threshold, the camera locks the current clip and the loop skips over it permanently. Locked files stay until you delete them yourself.
Two practical notes. First, sensitivity is adjustable on this model, and that matters. Set it too high and speed bumps and potholes will fill your card with locked clips. Set it too low and a light knock might not trigger at all. Start in the middle and adjust after a week of normal driving.
Second, always copy an incident clip off the card as soon as you can. A locked file is safe, but a card can fail, and the only truly safe copy is the one on your computer or in cloud storage.
Parking monitor and the power question
Parking mode is where a lot of buyers get caught out, so it is worth being clear.
When parking monitor is active, the camera wakes up and records if it detects an impact while the car is off. That covers trolley dents, door knocks and hit-and-runs in car parks, which is footage you otherwise have no way of getting.
But the camera needs power to do this. In almost every car, the 12V socket dies when the ignition is off. So parking mode needs one of two things. Either a hardwire kit, which taps a permanently live circuit in your fuse box, or an external battery pack that powers the camera independently.
Hardwiring is the tidier option and most auto electricians will do it quickly. Use a kit with a low-voltage cut-off so the camera shuts down before it flattens your starter battery. A battery pack avoids any wiring at all and takes no power from the car, but you have to remember to charge it.
If you only ever park in a secure garage, you may decide parking mode is not worth the extra step. If you park on a street or in a shared car park, it is probably the single most valuable feature here.
Who this suits
Commuters who drive the same congested route daily get the most out of a dual camera. So do parents sharing a car with a new driver, where a record of what happened is useful for more than insurance.
Rideshare and taxi drivers are another natural fit. Long hours, unfamiliar passengers and constant stop-start traffic all raise the odds of an incident, and a built-in microphone means cabin audio can be captured as well, where local law allows.
Fleet and minivan drivers are covered too. The listing names cars, minivans and buses as compatible vehicle types, and the suction mount works on any flat windscreen area.
If you drive rarely, on quiet roads, and park off-street, a single front camera may be all you need. There is no shame in buying less camera than the maximum.
Setting it up properly
Clean the glass first. Not a quick wipe, a proper clean with glass cleaner and a dry cloth. Suction mounts fail because of dust, almost never because of the cup itself.
Position the front unit behind the rear-view mirror. It stays out of your eyeline and gets a central view. Check your local rules on how much of the windscreen can be obstructed, because these vary.
Use the LCD screen to set the angle before you drive off. A common mistake is aiming too high, giving you a beautiful record of the sky and only a sliver of road. You want the horizon roughly in the upper third of the frame.
For the rear camera, run the cable along the headlining and down a pillar, tucking it into the trim edges with a plastic trim tool or even a credit card. Avoid routing anything near airbag locations. Take your time here, because a neat install is the difference between a camera you keep and one you take down after a month.
Then insert the card, plug in the power, and start the engine. The camera begins recording automatically and saves the file when you shut down.
Keeping it working
Memory cards are the weak point in every dash cam, because continuous recording is hard on them. Format the card in the camera every few weeks. This clears fragmented files and keeps write speeds steady. Set a reminder if you will not remember.
Wipe the lens with a dry microfibre cloth. Skip solvents and alcohol, which can damage lens coatings. Check the suction mount every so often and re-seat it if it feels soft.
Heat is the other enemy. A windscreen in summer sun gets brutally hot. Park in shade when you can, and if you are leaving the car for days in a hot climate, take the unit down.
The short version
A 2K dual dash cam does one job, which is to produce a clear, neutral record of what happened on the road. This one records 2K at the front and 1080P at the rear across a 170 degree view, loops its own storage, locks crash clips with an adjustable G-sensor, and can watch over the car when parked if you give it constant power.
Install it carefully, set the angle with the screen, format the card now and then, and copy anything important off straight away. Do that and you will probably forget it is there, which is exactly the point, right up until the day you need it.