NO HASSLE UPGRADE: Have an outdated DVR system with no audio? Use your current DVR cabling and easily swap out the cameras (sold separately) and DVR to add 2-way audio. No older system, no problem! Use the cables we provide to get everything set up. 2-WAY AUDIO: Sometimes seeing what’s occurring isn’t enough. With 2-way audio, you can hear everything you see and make your voice heard using our free mobile app, even when you’re away. PRIVATE DATA WITH SECURE CONNECTION: Your privacy matters. All recordings and data are stored on your recorder’s hard drive via a secure wired connection (CCTV) with no Internet required. You control who has access to your data. ADD WIRED BNC CAMERAS: Customize your coverage by adding up to 16 compatible Night Owl 2-way audio 4K wired BNC cameras (FTD8 series) to your wired recorder. ADD UP TO 4 Wi-Fi DEVICES: Instantly expand your viewing area by adding up to 4 compatible Night Owl 4K Wi-Fi devices.