Commercial Grade-- Professional network video recorder designed for businesses. Support 32 IP Cameras Input-- 6K 12MP/ 4K 8MP/ 6MP/ 5MP IP cameras, multiple add-on options. Dual Stream-- Advanced streaming technology enables smooth live view in poor network conditions. HEVC-- Adopt standard H.265+ high profile compression format to get high-quality video at much lower bit rate. Storage Capacity-- 2 SATA HDD ports, support 20TB hard drive for recording.(No HDD Included) 16 Channel Synchronous Playback-- Playback 16 cameras simultaneously on HD monitor or computer. Power Requirements‌: Operate within 240V max (verify voltage). Avoid unstable voltage to prevent short circuit. Ensure tight power cord connection. Use surge-protected, grounded power strip. Usage Guidelines‌: Use Shutdown Menu (no abrupt unplugging). Indoor use only, keep dry. Troubleshoot Technical Issues-- We offer 24/7 professional technical support- Amazon Messages or 0.5-2h PHONE support. ONWOTE 12MP 32 Channel NVR IP Security Video Audio Recorder, Only Work with ONWOTE 12MP/ 4K 8MP/ 6MP/ 5MP PoE IP Cameras, 2 SATA Support 20TB, 32CH NVR Work with Standard PoE Switch (No HDD Included)