D251 Series - 1080p DVR with Advanced Motion Detection

Model Numbers: D251 Series, D251A61B, D251A6I1B, D251A6I2B, D251A61B-2DA8S

Record 1080p HD video and customize your security experience with this innovative Digital Video Recorder (DVR) from Lorex. Featuring support for Smart Motion Detection, Face Detection, Face Recognition, Active Deterrence, and Virtual Fence (Perimeter Protection), this DVR will help you stay-in-the-know and secure your property. It will also fit right in with your smart home thanks to its Smart Home compatibility and voice recognition that gives you hands-free accessibility to add extra convenience to your monitoring. The local security grade hard drive also protects your privacy by keeping your data safe with you and off any costly cloud storage services.

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D Series DVRs: Audio recording

Describes how to set up Audio recording

D Series DVRs: Backing up video recordings

D Series DVRs: Changing the recorder’s output resolution

D Series DVRs: Configuring hard drive overwrite

D Series DVRs: Configuring recording quality

D Series DVRs: Configuring smart motion detection

D Series DVRs: Playing back recorded video

D Series DVRs: Setting a recording schedule

D Series DVRs: Setting up email alerts

D Series DVRs: Smart search

DVR / NVR - How to format your USB flash drive on your recorder

To make sure you can transfer files to or from your recorder, it is essential that you first format your USB flash drive on the recorder before moving any file.

DVR / NVR - How to manually upgrade the firmware of your recorder

If your recorder is connected to a network, it will automatically receive firmware updates.

DVR / NVR - How to Playback Recorded Videos on Your Computer

You can download recorded videos from your DVR or NVR to a USB flash drive and play them back on your computer. Depending on the file format of your video, you need the Lorex Player or the VL

DVR / NVR - How to Remove and Install a New Hard Disk Drive

The system comes with a pre-installed 3.5" SATA hard drive. You can replace the hard drive with one up to a maximum size of 8TB or 10TB (varies per model).

DVR / NVR - How to restore your recorder’s display resolution to factory default

This troubleshooting guide will help you restore your recorder’s display output to factory default so that you can restore your monitor’s live view.

DVR / NVR - Which Hard Disk Drive (HDD) is Compatible with Lorex Recorders?

The following FAQ details which type of hard disc drive (HDD) is compatible with Lorex recorders.

Popular Client Software and Mobile Apps

This page contains the updated list of all our current Client Software and Mobile Apps.

Technical Support: Frequently Asked Questions

We have curated these frequently asked questions (FAQs) to provide you with a quick and easy solution to technical issues regarding your Lorex product.

Understanding display resolution on Lorex cameras and recorders

Understand the different types of display resolutions on Lorex cameras and recorders.