Display Specifications:
The HRD-442 supports 4-channel BNC video inputs compatible with AHD (4MP), TVI (2MP), CVI (2MP), and NTSC/PAL formats. It offers resolutions up to 2560 x 1440 and supports live frame rates of 120fps and 100fps. Multi-screen display options include 1, 4, PIP, and sequence modes.

Performance:
The device operates on an embedded Linux system. It uses H.264 and WiseStream compression for recording, with rates up to 60fps for 4MP in NTSC and 50fps in PAL. Recording modes include manual, schedule, event, and time-lapse. Event detection includes video loss, motion, alarm input, and tampering.

Network Capabilities:
The HRD-442 supports IPv4 with a transmission speed of up to 64Mbps. It allows for up to 20 remote users and supports protocols like TCP/IP, DHCP, and RTSP. Monitoring is available via SSM, Web Viewer, SmartViewer, and iPOLiS Mobile Viewer.

Storage and Security:
The device supports up to 2 SATA HDDs with a maximum capacity of 8TB. Backup options include USB and e-SATA interfaces. Security features include password protection for multiple users and data authentication via watermarking.

Interface and Connectivity:
Video outputs include VGA and HDMI, supporting resolutions up to 4K. Audio inputs and outputs are available, with G.711 compression. Alarm inputs and outputs are supported, with remote notification via email. Connectivity options include Ethernet and RS-485 interfaces.

General Specifications:
The HRD-442 operates within a temperature range of 0°C to 40°C and humidity levels of 20% to 85% RH. It measures 370 x 44 x 320mm and weighs approximately 3.36kg. The GUI supports multiple languages, including English, French, and German.

Key Features:
The device is a 4-channel 4MP AHD DVR with support for TVI, CVI, and analog camera inputs. It offers high recording rates and supports HDMI/VGA outputs, multiple audio channels, and smartphone integration.