Night Owl 4K DVR — 20-Channel, 2‑Way Audio, Expandable Storage, Supports up to 20 Devices

High-resolution 4K DVR with built-in, innovative 2-way audio communication for clear talk-and-listen capability. You can upgrade to two-way audio without re-running cables — the system supports an easy 2-way audio upgrade using your existing cabling infrastructure. Keep footage private with a secure CCTV connection that protects your data locally. Store recordings locally at no extra cost by adding your own hard drive — free local storage when you install a compatible HDD. Receive immediate alerts for fast response to events, and monitor remotely with a free mobile app that has no hidden fees. Flexible device support: add up to 16 wired BNC cameras plus 4 compatible Wi‑Fi devices, allowing a total of up to 20 devices connected to the DVR.