Services Center

1. OEM Services                                                                                                                                                      

OEM is our biggest business parts. We cooperated with customers from France, India, United Kindom,Germany etc, most of them are offered with OEM services. We can print your own brand packing box, logo and users manual for products or meet your other demands. OEM services is free of charge if your order quantity is up to our MOQ requirements. Welcome your OEM orders.

2. Technical Supports                                                                                                                        

Car Parking Sensor is automatically activated when you engage reverse/brake gear,Sensors are fixed to the rear/front of the vehicle, which send and receive ultrasonic radio waves that bounce off obstacles and alert you to their presence. There is an internal buzzer that gradually increases in frequency as you approach the object.  A continuous tone denotes that you are within 0.35m (1ft) of the obstacle. Normally reverse sensors work in priority. 
Our products is of high quality because of strict production management and test, our defective range is controlled to be less than 0.3 percent, which is reasonable.Below is some solutions for checking if the kit doesn't work well.




Product do not work when reversing/braking

1.Wrong connection for power wire

1.check power cable

2. Wrong connection for insert plug    

2.check the plug connector

Product detect the same place always

the sensor is facing ground

check and adjust the angle of sensor

Product no detect digit show

 wrong connection for sensor,or sensor broken

check and re-power the kit again,or replace the sensor

False alarm

the sensor is facing ground or broken

adjust the sensor angle or replace the sensor

3. Car DVR                                                                                                                                             
We have different kinds of car dvr for your choice,and dvr comes without sd card,you can buy you there or ask us to sell dvr with sd card too.
DVR can record the videos when you drive car,it can be an evidence when traffics.

4. Sensors Categories&Colors                                                                                                       

We have many different kinds of sensors and their colors for choice to
satisfy different demands from you.
All sensors can be with waterproof connectors,which is easy to replace when defective.

Sensor colors: Black, Silver, White, Gold, Red, Green, Blue,Yellow,Gray etc... We also 
can paint your interested colors.Besides,the sensors can be painted with different colors 
by yourself,and it will not influence the function of parking sensor.

5. Car Rearview Camera&Car LCD Monitor                                                                                  
Chips optional for Car Rearview Camera: PC7070(low level),PC3089(high level)

6. Frequently Asked Questions                                                                                                       

Here we listed some of the Frequently Asked Questions, if you have more, just feel free to ask us at any time.    
1). What are my payment options?
For samples, it is 100% in advance.
For mass production, it is 30% in advance and 70% balance.
Welcome to use West Union, TT. bank account and Paypal.

2). How long will it take to ship my order?
As long as there is stock available, Longsin usually ships items within 3 work days for samples and within one to two weeks for formal order once receiving the confirmation of a new order. The order will not be confirmed until the payment reaches our bank account. If Longsin are temporarily out of stock, Longsin will do our best to inform you of the estimated lead time.

3). What does your warranty cover?
Longsin's product is backed by a 2-year limited warranty against manufacturing defects (material or workmanship). Missing/lost or worn out parts are not covered under our warranty.

4). Who will pay the freight for repairing items?
Both parties will share half the freight: the buyer will take the freight of sending it back to Longsin,while Longsin will cover that of sending it back to the buyer.  And Longsin suggests to send it back with the next mass production items.

5). Can I return product for credit?
Sorry, crediting product is unacceptable for now.

6). What is the ship term?

7). What does FOB mean?
FOB stands for Free On Board which is a term that is used with an identified physical location to determine a) the point at which title for the shipment passes from the seller (Server Products) to the buyer AND b) the responsibility and basis for payment of freight charges.

8). Who pays the freight charges when terms are FOB?
Buyers or the third party notified by buyers will bear the freight. The freight can be collected or prepaid. Your forwarder will always be Longsin’s first choice. If you have no forwarder, we are honored to appoint a forwarder for you.

9)How can I get your price list?
Please send us your email or sales call +86-755-36962088 for our price list and order information.

10). How to place an order?
Please send PO to Longsin and Longsin will send back a PI accordingly. You will wire the payment and send T/T copy for our reference. Then the products will be in preparation. After getting the payment, the items will be sent out ASAP.