Frequently Asked Questions

  • How to order the hidden dash cam suitable for my car model?
  • What SD card is needed for dashboard camera?
  • Why my dash camera don't loop record?
  • How to format a micro SD card for dash cam?
  • Where to mount dash cam
  • How long does a dash camera store data?
  • What payment methods do you accept?
  • Can I place an order without creating an account?
  • Where is my order confirmation?
  • Why has my order been canceled?
  • Can I alter my order?
  • How much is shipping?
  • Can I track my order?


How to order the hidden dash cam suitable for my car model?

We have hundreds of car dash cam shell models for Mercedes, BMW, Audi, Porsche, Land Rover, Cadillac, Volkswagen, Maserati, LEXUS, Infiniti, Honda, Toyota, Geely, Trumpchi, Souast, Ford, Volvo, Chevrolet, GWM, Buick, Zoyte, Landwind, Peugeot, DS, Jeep, Changan, Renault, LINCOLN, BORGWARD, Roewe, Red Banner, Tesla, MAZDA, BYD, CAC, Xpeng, etc. You can reach Mercylion to send the rear-view mirror cover picture, vehicle model, and the vehicle year when ordered or before you going to buy. We will according to your car model recommend the OEM fit dash cam.

What SD card is needed for dashboard camera?

If you want to get the best video quality from your dash cam, you should option for a high-end Micro SD card. You can choose your storage car from the top 6 things to consider based on your preference: SD Card Brand, SD Card Types, Storage Capacity, Speed Rating, Durability, and Price. For more details read this article.

Why my dash camera don't loop record?

There are 7 common possible reasons why the dash cam cannot record in a loop.

The loop recording of each driving recorder has an on and off setting. Check whether your dash cam has been turned on and set the time of the loop recording.

The speed of reading and writing the memory card of the driving recorder is slow, which may result in the inability to record continuously. It is necessary to ensure that the memory card is a genuine card, and a Class 10 Micro SD card with a faster card speed can be considered.

Insufficient memory card storage space, remember to manually format the memory card 1-2 times one month.

If the crash video clip of the dash cam disappears, it may be that the dash cam is powered off during the collision, causing the crash video clip to disappear. It may also be that the driving recorder is stuttering or lag, and there is a loss of recording. In addition, it may also be a problem with the settings of the dash camera itself. When the car collision, the locked video of some dash cams will be renamed and saved, making it difficult to find.

If the motion detection function is turned on while driving, it may also cause the video to not be covered, so you can choose to turn off the motion detection when you driving.

The loop recording time setting should not be too short. If it is too short, the video files will be broken and the service life of the memory card will be shortened. If the time setting is too long, it may be troublesome to find the accident footage, so it is generally recommended that you set it to 3 minutes or 5 minutes.

Abnormal time of dash cam. The problem with the abnormal time of the dashcams is that every time the dash cam is turned on, the time will return to the initial state or stays at the time of shutdown.

How to format a micro SD card for dash cam?

The easiest, fastest, and most recommended method is in the format dash cam itself. Mercylion mirror dash cam has an inbuilt format function that can be run via the camera menu. Formatting the card in the dash cam should take around 10 seconds.

For Mercylion's hidden dash camera, we support WIFI connection. You can format a Micro SD card with the Mercylion App. After connecting to the device's WIFI, enter the Mercylion App and click connect to the dash camera to get into the WIFI direct connection interface. The mobile phone can preview the recorder in real-time through the APP, device design, video and photo preview, and download and delete operations. If you need to format the Micro SD card, select "Format SD Card" in the settings menu, and then a warning will pop up on the App interface. The format command will clear all data on the SD card. Do you want to continue? Please click the OK button. Your SD card will complete the format command.

Where to mount dash cam

If you're looking for a place to mount your dash cam, consider where you will place it most often - behind the windscreen, on a rear view mirror, on the passenger seat, or on the top corner of the windscreen. Some places are easier to reach when you're driving, but they may not be the best options for your car. The best place to mount a dash cam depends on the model of dash cam, type of mount, and personal preference. Whether there are one, two, or three cameras will also affect dash cam placement. Learn more about dash cam mounting places.

How long does a dash camera store data?


Photo Resolution 4G 8G 16G 32G
1920x1080(30fps) 34 min 68 min 136 min 272 min
1280x720(30fps) 40 min 80 min 160 min 320 min


What payment methods do you accept?

We accept the following credit cards: MasterCard, Visa, American Express, Diners Club, Discover, and JCB. We also accept payment by PayPal. If you use PayPal, you’ll be taken to the PayPal website, where you’ll be prompted to log in and process your payment. You’ll then be directed back to our merchant website once your transaction is complete.

Ordering and delivery

Can I place an order without creating an account?

Yes. You can place an order as a guest with no obligation to create an account. We do recommend that you create an account, however, if you’d like to check your order history and have your shopping basket items and payment details saved for next time. It’s quick and easy to create an account. Just visit  and create your account.

Where is my order confirmation?

This is automatically sent to your email address when you place an order. If you haven’t received your order confirmation within 24 hours, please get in touch at just in case there’s a problem with your order. Please check your mailbox’s spam or junk folder before contacting in case the order confirmation has been diverted there.

Why has my order been canceled?

We typically only cancel orders if there’s a problem with stock, or if you’ve asked us to cancel. Please accept our apologies if your order is canceled because of a problem at our end. We’ll always offer an alternative product and process your refund in full, as quickly as possible.

Can I alter my order?

Sadly, we’re unable to modify your order once we’ve started processing it. If you need to order a greater quantity or an additional product, please place a new order online.

How much is shipping?

Shipping costs depend on the item you’ve ordered and the country where it’s being delivered. You can learn the shipping fees for different destination countries at the checkout page. If your order value is more than $200, we provide free standard shipping. Learn more about the shipping policy.

Can I track my order?

Yes. We’ll provide updates at every stage of your order, from the moment you place it, through to despatch and delivery. In your delivery confirmation emails, you’ll receive a tracking reference which you can use to check the progress of your order online.