Key features

• •This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high-performance bar may offer Certified Refurbished products on Amazon.com.
• •This 4 channel 4-in-1 DVR which supports Analog, HD-TVI, CVI, AHD Camera. it provides you the flexibility to add 4pcs 720P or 1080P cameras.
• •Be notified when there are unexpected movements. Smart notifications with image will be pushed to your smartphone via iPhone/Android App. And you won't miss any moment with remote and local playback.
• •The ZOSI VIEW free app lets you see all of your cameras in one place. Check in on your home or business wherever you have an internet connection. Free ZOSI VIEW App for Live View & Playback on Smart Devices with Wi-Fi or 2G/3G/4G Anywhere Anytime. Smart Phone Support: iPhone, Android, iPad.
• •This DVR is pre-installing a 1TB security hard drive. (But it will not come with cameras). DVR can be set to automatically overwrite the oldest internally stored footage or you can transfer those video files by USB to a memory stick or external hard drive.