4 Channel AHD Mobile Digital Video Recorder WIFI Optional 2 SD Card Black Appearance

4 channel AHD Dvr GPS Mobile DVR 2 * SD Card Black Appearance

Visionmaster Products' Advantages :

1. Power failure protection.
2. Wide voltage (6-48V, Seldom other companies can achieve this function, other companies only can ac
hieve 8-36V).
3. OTA function support. (Upgrating DVR software automatically, better after-sales service for you.
4. A SMS can get DVR situation feedback from DVR
5. Industrial level design. (More professional and better quality.)
6. Modular design. (To prevent a module error while affecting the entire product.)
7. Encrypt video format. (To prevent data loss)
8. Current and voltage over protection.
9. Wide working temperature. (-25°C- +75°C).
10. Data redundancy technology. (To prevent data loss)
11. Excellent vibration protection.

• FAQ:

• Why devices don’t record when they start?

• 1. Please check whether the SD card interface of the front version of the device has an SDcard.

• 2. If the SD card exists, check the status of the storage disk in the system informationinterface:

• Status classification: non-existent, unformatted, normal capacity is not full, capacity isnormal, the disk is full

• Status description:

• a. Does not exist, the device does not detect the SD card, please check the SD card on thecomputer, or replace the SD card, replace the device to detect whether it is an SD cardproblem or a device problem

• b. Unformatted, please format the device in the device formatting interface. After theformat is completed, check whether the SD card capacity can be displayed normally.

• c. The capacity of the normal disk is not full, please check the recording mode setting tdetermine whether the recording conditions are met.

• d. The capacity of the normal disk is full, please check if the video overlay switch is turnedon.

• Why devices on vehicles often restart ?

• 1. Frequent restarts: the device repeatedly goes offline; the video is intermittent, notcontinuous

• 2. Causes frequent restarts:

• a. The vehicle is not powered stably. Please measure the input voltage of the device whenthere is a problem with the device. The probability that the device will restartfrequently due to this situation is more common in practical applications.

• b. The storage disk has failed. Format the storage disk or replace the storage disk whileretaining the data.

• c. Device software or hardware problem, please remove the storage device hard disk or Scard, if the device is powered normally, the device still restarts. Please inform thetechnical support personnel of the software version number and return to the factoryif necessary.

• Why GPS location information can’t be seen in device?

• 1. Check if the status of the module on the device is present

• 2. Check if the GPS antenna is connected properly. The antenna should be placed in a wideand unobstructed place to have a signal. If the vehicle passes through the tunnel during thedriving process or if there is a tall building or a large tree, the signal will not be received. Thisis normal. Phenomenon

• Why we can’t see vehicle location while device is online?

• 1. Please check the set GPS upload interval on the platform

• 2. The GPS signal on the device can receive normal positioning information for the platform, so please check whether the GPS signal on the device is displayed normally.

• Why GPS location information can’t be seen in device?

• 1. Check if the status of the module on the device is present.

• 2. Check if the GPS antenna is connected properly. The antenna should be placed in a wide
  and unobstructed place to have a signal. If the vehicle passes through the tunnel during the
  driving process or if there is a tall building or a large tree, the signal will not be received. This
  is normal. Phenomenon

• Why can’t connect back end server but device runs normally?
  1. The 3G connection to the platform server must be successfully dialed by 3G. Please
  confirm that the 3G module has successfully dialed. 2. Check whether the server IP and port set on the device are correct, and report the ID for
  conflict. 3. Is the back end server running normally, is there any other vehicle online?

•