Main image and detail shots of the MDVR-504EC.
MDVR-504EC (MR9504EC / 9504EC) 4-channel 1080P wide-voltage car video recorder (single SD card player)
Send the vehicle type, quantity and market — we reply with a configuration and price within 24 hours.
Key features
- 4-channel 1080P SD mobile DVR with single SD card slot, no hard disk
- 4CH 1080P AHD / TVI / CVI / CVBS four-in-one video input, 4CH 1080P live preview and storage
- H.265 / H.264 dual encoding, high compression ratio and clear image
- 9-32V DC wide-voltage professional vehicle power supply
- Under-voltage / short-circuit / reverse-connection protection with smart power management (low-voltage shutdown, low standby consumption)
- Built-in supercapacitor: no data loss or card damage on sudden power outage
- Supports UPS power input
- Video output: 1 x VGA + 1 x aviation AV output (VGA optional)
- Camera input: 4 x M12 aviation connector (aviation connector)
- Alarm input 4 digital inputs (positive / negative trigger), 1 alarm output, 1 RS232 (TTL), 1 USB 2.0 for USB stick or mouse
- GPS / BD optional, supports antenna plug-in / unplug / short-circuit detection
- Built-in 4G module, LTE / HSPA / WCDMA
- Special file management system encrypts and protects the data; SD card bad-track detection keeps video continuous and extends card life
- Reversing image ranging assistance; image horizontal / vertical mirror adjustment and 90 degree rotation
- Unique GPS drift suppression algorithm
- Compact metal housing 140 x 153 x 31 mm, typical consumption 3.5W (without peripherals)
- Chinese / English / Russian OSD, user and admin two-level passwords, mouse operation
- Card machine for taxis, vans, buses and light commercial vehicles
Ordering notes
Points to confirm before production so the unit arrives ready to fit.
- This model is a single SD card machine (9504EC basic model), confirm the capacity requirements, and supports a maximum of 512GB
- This model does not support remote control and can only be operated with a mouse. It is not equipped with a remote control by default
- Confirm if GPS/Beidou version and antenna are required
- Confirm the 4G version and frequency band requirements (the frequency bands are different in different sales areas), and who provides the SIM card
- Confirm options: VGA output, IPC camera, WiFi, TTS speaker, intercom handle, alarm button
- Confirm the number of cameras, cable length and connector type (M12 aviation connector)
- Confirm whether ministry standard agreement (JT/T808, JT/T905) and platform docking are required
- 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 host is fixed and installed horizontally to avoid hanging and long-term strong vibration positions
- The installation location must be waterproof, shockproof, and interference-proof, and away from air-conditioning outlets and in-car audio and video equipment
- The GPS antenna should be placed horizontally with no obstruction above it; the 4G antenna should not be bundled with messy wiring harnesses
- The power must be cut off before inserting or removing the SIM card or SD card
- Unused channels must be deactivated in the menu, otherwise video loss alarms will continue to be reported
- Regularly check the recording time, screen and loop coverage, and export important videos for backup in a timely manner
- The fuse of the fuse must be above 10A; the diameter of the extension cord should not be less than 1.5mm², and the diameter of the signal line should not be less than 0.5mm²
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-504EC?
Send us the quantity, the vehicle or application, and the destination market. We will confirm the specification and quote within 24 hours.