How to Setup and Activate the Defender 4K (8MP) DVR Security System Related articles Defender 4K Manuals, Firmware & Quick Start Guides Defender 4K | How to Setup the Defender 24-7 App with Defender 4K How do I set up my Defender Guard Camera? 21000 Series | How to open ports for your 21000 and SN Series Defender Security System for Smartphone Viewing Defender HD Manuals, Firmware & Quick Start Guides
