Recently, when I visited the mall, have you always seen square screens hanging at the elevator entrances and corners of the corridor? Some are broadcasting promotional information, while others are displaying surveillance screens. This is both advertising and securityLED monitoring screen​, it has now become a standard equipment in the mall. But the question is - the bosses who want to install this kind of screen, eight out of ten are asking: "Where should I buy this kind of multifunctional display? The manufacturers found online look similar, and the price difference is that they can buy a BMW!"

1. The monitoring screen is not an ordinary advertising screen

Don't rush to place an order,​The monitoring screen and the ordinary advertising screen are all different things​​. Ordinary advertising screens only broadcast videos, and the surveillance screens must meet these special needs:

• 7x24 hours of uninterrupted operation, even more capable than convenience stores
• At the same time, multiple monitoring signals are connected, and the screen switches in seconds without lag
• The brightness must be automatically adjusted, so you can see clearly during the day and not dazzling at night
• With anti-blue light function, staring at you for half an hour without any blur

To give a real case: a surveillance screen installed in a shopping mall in Tokyo can not only display 20 camera images in real time, but also insert holiday promotional advertisements. This one-screen dual-use design cuts the operating costs by one third.

2. Depend on these four points in quality

Don't be fooled by the fancy words of sale,​Try these three tricks​：

1. ​Touch the heat dissipation hole​: High-quality air outlet with dustproof net, no cut when touched
2. ​Look at the splicing seams​: Put A4 paper into the screen seam. If you can get stuck, don’t buy it.
3. ​Try multi-screen switching​: Play 4-channel 4K videos simultaneously, and pass directly with stuttering
4. ​Check the night mode​: After turning off the light, the brightness will automatically drop below 300nit to be considered qualified

Once I went to the supplier to inspect the goods and found a strange operation - a batch of surveillance screens actually used home TV motherboards! This kind of screen is open for three consecutive days, and it is simply a thunderbolt for shopping malls.

3. Find a manufacturer's golden rule

Now I know how to inspect the goods,Where can I find a reliable source factory?​? Remember these four hard indicators:

• Real photos of the workshop: Direct elimination of no dust-free workshop without ten thousand levels
• Aging report: Running 50℃ high temperature for 100 hours in a row will be considered as passing the test
• Check security certification: Don’t consider it if you don’t have GA/T certification
• Test signal compatibility: Only those who connect to Hikvision and Dahua cameras at the same time are real

Details only an expert knows--​​Real monitoring screen dares to display the backend system with bare metal​​. Those who only show you the playback interface are mostly covering up the shortcomings of signal processing capabilities.

4. Configuration selection and matching

Why do some of the same 55-inch surveillance screens claim 20,000, and some dare to ask for 80,000? The price difference is mainly in these few:

Pay special attention to the installation fee. Some manufacturers calculate the lifting fee to 300 yuan/square meter, and install a 20-square-meter screen light installation fee of 6,000 yuan.

5. Installation location determines life and death

It's not that everything will be fine if you buy the screen,​Installation of the wrong position changes to the decoration in minutes​​：

• ​​Elevator waiting area​: The viewing angle should be ≥160°, and the brightness should be controlled within 800nit
• ​Atrium Dome​: You must choose an elevation angle adjustment bracket to prevent reflection glare
• ​Fire access​: Must bring a backup power supply, and it can last for 30 minutes after power outage.
• ​​Shop corridor​​: Thickness ≤80mm, do not affect fire inspection

The most professional installation team I have ever met, with a decibel meter to adjust the background volume to ensure that the sound pressure level difference in each area does not exceed 3dB. This kind of meticulous work is impossible for ordinary construction teams to think of.

6. Remember the guide to prevent pits

Finally, give some tricks to the newbies.​Confirmation must be made before signing the contract​：

• You need to bring computer room debugging records and see the full load operation data
• Check the diameter of the power cord, please do not
• Try for seven days without reason, the one who dares to agree is the true confidence
• Look at the after-sales outlets, there is no pass with provincial maintenance points

Don't believe in the false words of "military quality", let the manufacturer demonstrate it directly32-channel signal screen​. The real skill is to switch smoothly without black screen.

To be honest, choosing a shopping mall monitoring screen is just like choosing a property manager. Next time I encounter someone who brags about not paying taxes, I will ask him directly if he dares to sign.​Five-year zero-failure protocol​. Remember, the heat dissipation hole of a good screen is more particular than the air conditioner outlet, and the motherboard chip of a bad screen is hot when you touch it. When you go shopping in the mall next time, you might as well pay attention to the corners of the surveillance screen - there is the manufacturer's conscience hidden there!

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