Main image and detail shots of the MDVR-704C.
MDVR-704C (MR9704C / 9704C) 4-channel 720P hard drive vehicle video recorder (five-in-one)
Send the vehicle type, quantity and market — we reply with a configuration and price within 24 hours.
Key features
- 4-channel mobile DVR with 2.5 inch hard disk / SSD storage
- H.265 / H.264 encoding, high compression ratio
- 4CH 720P AHD / TVI / CVI / CVBS five-in-one video input (AHD / TVI / CVI / analog)
- 4CH 720P real-time decoding, local 4-channel playback, single / quad display
- 1 CH VGA video output + 1 CH aviation AV output
- Storage: SD card up to 512G plus 2.5 inch HDD / SSD (interface definition lists up to 4TB, parameter table 2TB, to be confirmed)
- 9-32V DC wide-voltage professional in-vehicle power design with under-voltage / short / reverse-plug protection
- Smart power management: low-voltage shutdown, standby only 4mA @12V
- Built-in supercapacitor to avoid data loss and disk damage on sudden power outage
- Proprietary hard disk bad-track detection: continuous recording and longer disk life
- Recording quality class 1-6 selectable; audio and video synchronized recording (G.711A / G.711U / G.726)
- 4 alarm inputs, 1 alarm output, 1 LVTTL UART, 1 USB 2.0 (USB stick / mouse)
- GNSS GPS / BD / GLONASS optional with antenna detection; built-in 4G netcom; WiFi 802.11b/g/n 2.4GHz optional
- IPC interface: 6-pin M-12 aviation connector
- Reversing image ranging assistance; image horizontal / vertical mirror adjustment
- Unique GPS drift suppression algorithm; OSD in Chinese / English, mouse operation
- Metal housing 162 x 153 x 52 mm; typical consumption AVG 6.24W (without peripherals)
- Also available in a local version without 4G and without GPS
Ordering notes
Points to confirm before production so the unit arrives ready to fit.
- Confirm whether you want the version with 4G/GPS or the local version "without 4G without GPS"
- The resolution of this model is 720P / 960H / D1 (4-channel 720P real-time); if you need 1080P, please choose 8-channel 708C or other models
- Hard drive capacity: The parameter table says the maximum 2.5-inch hard drive is 2TB, and the interface description says the maximum is 4TB. Please confirm before placing an order
- Not equipped with remote control by default
- Confirm options: SD card capacity, IPC camera, WiFi, GPS antenna, TTS speaker
- Confirm the ministry’s standard agreement and platform docking, and who will provide the SIM card?
- Confirm the number of cameras, cable length and connector type (4-way aviation connector)
- Confirm power source (ACC or permanent live) and whether delayed shutdown is required.
- Confirm quantity, packaging and printing requirements in advance.
Installation & usage
Voltage, wiring, sealing and maintenance guidance for the installer.
- The power supply is 9-32V; the red wire is connected to normal power, the orange wire is connected to ACC, and the black wire is grounded. The positive and negative poles cannot be reversed
- The hard disk model must be installed horizontally and fixedly and well damped to avoid long-term strong vibrations that shorten the life of the hard disk
- The host must be installed in a waterproof, shockproof, and interference-proof location, away from the air outlet of the air conditioner and the audio-visual equipment in the car
- Disconnect the power before inserting or removing the hard drive, SD card or SIM card.
- The camera wiring harness and power cord should be routed separately to avoid image interference and snowflakes
- Regularly check the hard disk health status, recording time and loop coverage, and back up important videos in a timely manner
- Unused channels must be deactivated in the menu to avoid video loss alarms
- The fuse of the fuse must be above 10A; the diameter of the extension cord should be no less than 1.5mm²
Specification guides for this kind of product
Written by our engineers for buyers comparing specifications, not slogans.
MDVR Buying Guide: How to Specify a Mobile DVR
How to choose a mobile DVR: channel count, SD versus hard drive, H.264 versus H.265, GPS and 4G, temperature ratings, UPS power and how much footage to keep.
The Wiring Mistake That Kills Monitors in MDVR Installations — And the Zero-Cost Fix
Why monitors fail months after an MDVR installation: power feed through the shared aviation cable, and the wiring change that isolates the two.
25, 30, 50 or 60 fps: What Actually Limits a Vehicle Camera’s Frame Rate
Why a camera that can run at 60 fps ships at 25, what the analogue and processor limits are, and how to check a frame rate claim.
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View detailsNeed a quotation for the MDVR-704C?
Send us the quantity, the vehicle or application, and the destination market. We will confirm the specification and quote within 24 hours.