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Lightweight 720P SD Mobile DVR Double SD Card 4 Channels

Good quality 4G Mobile DVR for sales
Good quality 4G Mobile DVR for sales
Customer Reviews
Hi Betty!!!The goods arrived today and we are just amazed of the quality and craftsmanship of the units. The delivery timing and the package are just outstanding!!!! We will proceed to install the units in two of our vehicles as the DEMO for our customers. We have a presentation scheduled in two weeks and we want to be on time to showcase the product. Thank you very much for all your help

—— Luis

Hello BettyThe units are very nice!! A first class product all the way!! We might more orders in the coming days...again ThanksJon

—— Jon

Dear Betty ,  I recived the Units in good condition . Thanks shumaiz​

—— Shumaiza

Betty, I have received the order and everything looks fine. I will install the units this week and start the testing. thank you, Octavio

—— Octavio

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Lightweight 720P SD Mobile DVR Double SD Card 4 Channels

China Lightweight 720P SD Mobile DVR Double SD Card 4 Channels supplier
Lightweight 720P SD Mobile DVR Double SD Card 4 Channels supplier Lightweight 720P SD Mobile DVR Double SD Card 4 Channels supplier Lightweight 720P SD Mobile DVR Double SD Card 4 Channels supplier Lightweight 720P SD Mobile DVR Double SD Card 4 Channels supplier

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Product Details:

Place of Origin: China
Brand Name: QOHO
Certification: CE,FCC
Model Number: QH-MDVR7104S

Payment & Shipping Terms:

Minimum Order Quantity: 1pc(sample test)
Price: Negotiate
Packaging Details: 12pcs/CTN
Delivery Time: Within 5-7 days after received payment
Payment Terms: T/T or West union
Supply Ability: 10000pcs/month
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Detailed Product Description

Lightweight 720P SD Mobile DVR Double SD Card 4 Channels




● 4x720P/D1/HD1/CIF AHD camera support;
● High-performance SD card mobile DVR;
● Connect acceleration sensor, temperature sensor, oil amount, control panel and other peripherals through the preset interface;
● With aviation connector, stable and reliable, using time longer.
●Support 4CH audio & video;
●3G/4G, WIFI, GPS for optional ;
●Support PTZ local and remote control;
●Support dual SD cards.


Product Technical parameters:


Model QH-MDVR7104S
Industrial Design ARM Linux
GUI Setup system parameters through the Panel controller
Language Chinese, English, other(optional)
Security User password management
Video and preview Video input 4 channel input; 1 channel output; 1.0Vp-p, 75Ω
OSD Overlays letters… like date & time information and vehicle ID into video streaming
Video Compression Criteria H.264.With Hisilicon technology
Dual stream Support.(High bit-rate stream used for local HD stroge,low bit-rate stream used for network transmission )
Resolution Support CIF,HD1,D1,720P
Video quality 1-5 levels, 1 is the highest level and 5 is the lowest level
Video Bit Rate CIF: 256Kbps ~ 1.5Mbps, 5 quality level support
D1: 800Kbps ~ 3Mbps, 5 quality level support
Preview Support 1 channel and 4 channels preview. PAL: 25Frame/s NTSC:30Frame/s;720P PAL:200fps,NTSC:240fps
Audio Audio Input 2 channel input;
Audio Output 1 channel output
Compression G.726
Record Storage SD card, Support dual SD cards, max 128G, support SDHC standard, record one full change anotheragain, delete circularly(delete video is the earliest time)
File Type H.264 ASF,FAT32
Recording Mode Default auto recording after power on, support timed recording, alarm recording.
Video Search Search video by time, type (normal or alarm), target SD card
Video playback Support 1 to 4 channels playback simultaneously
Support forward and backward at the speed of: x2, x4, x8, x16.
Alarm Alarm input Support up to 8 channels alarm input
Alarm record Include the recording within 10 seconds ahead of the alarm starting, and the recording after
alarm dynamically adjusted, the range:30s~30 minutes
Alarm of storage Support storage alarm
Alarm of video loss Support
Communication Serial Interface Support 2 RS232 and 2 RS485
Interface Network interface RJ45,10M / 100 M adaptive network interface, support 3G routing
G-Sensor Built-in G-Sensor
Wireless transmission 3G wireless transmission module, WCDMA, CDMA2000, TD-SCDMA system optional (optional), Compatible with GPRS, EDGE;
Support up to 4G;(optional)
WIFI Optional
GPS GPS or BeiDou ;(optional)
Upgrade Upgrade by SD card or USB
External Interface Support data export to USB, Interface charge
Power&consumption Power management 1.ACC ON/OFF
2. System power off according to the delay time
3.Timing ON/OFF
With overload protection, under voltage protection, short protection,
Power input DC:+8V ~ +36V
Power output +12V@5*0.5A;
Power consumption The normal state<10W;Standby 0W
Working Operating temperature -25℃ ~ +80℃
environment Operating Humidity 10% to 95%
Dimensions Body size:160(W) x 50(H) x 140(D) mm







Product work diagram:



Our mobile DVR and car cameras have had a great contribution for Government and Policeman in Australia!

Lightweight 720P SD Mobile DVR Double SD Card 4 ChannelsLightweight 720P SD Mobile DVR Double SD Card 4 Channels

Our mobile DVR and car cameras have been got great effect from over all the world!

Lightweight 720P SD Mobile DVR Double SD Card 4 Channels

Installation picture:

Lightweight 720P SD Mobile DVR Double SD Card 4 Channels

Remote view in real time recording on Iphone/Ipad/Android phone/PC once MDVR is built-in 3G.

Lightweight 720P SD Mobile DVR Double SD Card 4 Channels

Lightweight 720P SD Mobile DVR Double SD Card 4 Channels

Playback all video file and GPS tracking(Playback Analysis Software).

Lightweight 720P SD Mobile DVR Double SD Card 4 Channels

Center Management Software:

Lightweight 720P SD Mobile DVR Double SD Card 4 ChannelsLightweight 720P SD Mobile DVR Double SD Card 4 Channels

CMSViewer(Remote view in realtime recording once mobile DVR is built-in 3G):

Lightweight 720P SD Mobile DVR Double SD Card 4 Channels



Lightweight 720P SD Mobile DVR Double SD Card 4 Channels


Q: What can I do when I found a problem with the product, but I can not solve it by myself?
A: Take note of the model and software version number, then submit a detailed description of the problem to the technical supporting engineers to analyze; the more detailed you have submitted, the more convenient for us to analysize.

Q: How about when there is no video output from the vehicle host device?
A: 1.Check the host’s turn-on status, if only a blue light on, it means the host is in standby status and has not been started up yet, meanwhile check whether the host’s power cords red & yellow cords are in power supply status or not, if only one cord is supplying power, the device is unable to start up.
2.Check the power supply status of display screen, as well as check whether the display video has been switched to AV status.
3 Check the connecting status between the host’s video output cable and display screen.
4 check whether the lock status of the host’s LOCK, it must be locked before normal starting up.

Q: How to do when the car host video input interface is different from the camera output interface?
A: The car uses 4PIN type while camera uses BNC or aviation head type, if not in correspondence, please use conversion head for connection or wiring based on standard corresponding according to the cable sequence defined by the car host.

Q: How to do when the device does not conduct video recording after it is turned on and SD card has already been installed?
A: 1.Check whether the SD card has been formatted or not after installation, because unformatted SD card cannot be used. Enter System Menu - System Tools - Device Format to format the newly installed SD card;
2. Check to see whether video channel is closed or not, whether set a timer recording or not, it will not take video when it is not within the video recording time period.
3.Check the SD card inserting status and whether the SD light on front panel is on or not.

Q: The video file is missing or there is no video file within a certain period of time, how to do?
A: 1. Determine the time period by analyzing the final video file before missing and the first video file after recovery.
2. Confirm whether the host is not on during that period of time, such as when the driver halfway parking, loading and unloading goods while the host is not set by video delay.

Q: When car PTZ cannot be controlled, it cannot rotate up and down, how to do?
A: Check whether PTZ protocols and baud rate are set correct, address codes are corresponding or not, whether have selected to maximize the video of the channel when control the PTZ, for example, when control the second channel, it must maximize the screen of the second channel image to control it.GPS-related issues

Q: GPS module exists but no coordinate information?
A: 1.Check whether GPS module exists, if it does not exist, check whether the hardware is installed or in a good contact.
2.Make sure that the GPS antenna contacts are good, whether the antenna is broken, it is recommended to be located in places with strong signal, note that some car glass shielding film will block GPS signals;
3 If the test is in the room, the signal of GPS antenna in the room will be obscured, it is recommended that the GPS antenna is placed outdoor.

Q: Deviation of GPS location on map?
A: It means the signal is valid if the GPS module already positioned, there may many reasons for the deviation, such as government restrictions, permissible error, GPS signal interruption, etc; the actual satellite map may have deviation for security reasons, general map can solve the problem by using GPS correction.3G wireless module

Q: If use the 3G wireless module for dial-up, what do I need to pay attention to?
A: 1. Choose the built-in wireless module WCDMA or EVDO, corresponding module settings are not the same, the modules supported by different machines models are not the same, so please make sure whether your module and SIM is in correspondence. Do not use telecom SIM card on WCDMA machine;
2.Check whether the settings of Server IP and port are correct, whether 3G signal is strong enough for dialing, and then check whether the 3G dial-up is successful or not.
3. When dialing is unsuccessful, please check 3G antenna is in good contact or not, the dial up may fail because of weak signal, moreover, please check whether the SIM card has enough traffic, if no traffic, dial-up will be unsuccessful.

Q: When 3G has neither report nor video , what should be done first?
A: Press INFO key to enter the system information page, check whether the SIM card exists and view the signal strength as well as dial-up status, whether the antenna is in good contact, and then check the SIM to see whether it is out of traffic, the most basic judgment is to replace the SIM card. If the dial up failed with signal, then check whether the settings of center number and the port are correct. Moreover check whether the device number of the product is already occupied.

Q: 3G signal is intermittent, video is jammed?
A: At present the signal coverage of WCDMA and EVDO is rather wide, however, there are some mountainous districts without signal coverage, and some suburban areas have weak signal due to the local network constraints, then it will be jammed during watching of video, or video cannot be watched at all, the greatest impact of this situation is from the local network; Moreover check whether the frame rate setting of sub-stream is too high, because the video may also occur such situation when the network is poor and frame rate setting is high.

Q: Why the vehicle and video cannot be seen in CMSviewer client when the device has been started?
A: At first make sure the central registration server is switched on and on the net, then check whether the host device number has been occupied to cause conflict, secondly check whether the settings of server-centric IP and port are correct; devices report to the center via the built-in 3G module or via WIFI. If via built-in 3G, please check whether selected the correct type of built-in 3G module, for example, WCDMA and EVDO module needs the support from corresponding SIM card, check whether the antenna is in good contact; If it still can not report when above all are checked, enter into the system information page to view dial-up. If dial-up is not successful, look up whether the setting of data access point and center number is correct. If all ultimately fail, please collect as much information as possible to submit to the technical supporting staff for analysis, the more data provided, the more convenient for technicians to solve the problem.

Q: The device is online, but why can I not see the video image?
A: Please set lower sub-stream to transmit image, the blocked or slow transmission speed situation may occur when the sub-stream frame rate is set very high and be affected by network uploading limit; poor network signal or intermittent will seriously affect the video transmission.

Q: The device is properly reported on CMSviewer, but the videos cannot be seen after using for some time?
A: Firstly check whether the host side displays dialing, if it keeps the dialing status, it may be because the flow of the SIM card has run out, replace the SIM card to test; Secondly query whether the host device number has been modified by the driver, the host with modified device number needs to be resubmitted to add vehicle information; thirdly, if it still does not work by changing the card, it will need to check whether the host’s 3G module fails.

Lightweight 720P SD Mobile DVR Double SD Card 4 Channels
Lightweight 720P SD Mobile DVR Double SD Card 4 Channels


Contact Details
Shenzhen QOHO Electronics Co.,Ltd

Contact Person: Mrs. Betty zhao

Tel: 86-755-18018751197

Fax: 86-755-61624570

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