Technical Specifications:
Video Input:

Channels: 4 IP camera channels, allowing for the simultaneous recording of multiple camera feeds.
Maximum IP Camera Resolution: Supports up to 4K (3840 x 2160) resolution for clear and detailed video recording.
Video Compression:

H.265+/H.265/H.264+/H.264: Supports advanced video compression standards to optimize storage efficiency while maintaining high video quality.
Recording Capability:

Recording Resolution: Capable of recording video in various resolutions, including 4K, 1080P, and lower resolutions depending on the camera specifications.
Recording Speed: Up to 100 Mbps incoming bandwidth, ensuring smooth and uninterrupted recording of high-resolution video.
Storage:

Hard Drive Support: Compatible with one SATA hard drive (up to 10TB), providing ample storage for recorded footage.
Storage Management: Supports various storage modes, including manual, scheduled, and event-based recording.
Network Interface:

Ethernet Ports: 1 x 10/100/1000 Mbps self-adaptive Ethernet port for network connectivity.
ONVIF Compliant: Ensures compatibility with a wide range of IP cameras and devices from different manufacturers.
Audio Input/Output:

Audio Channels: 1 audio input and 1 audio output for two-way audio communication when connected with compatible cameras.
User Interface:

User-Friendly GUI: Easy-to-navigate graphical user interface with support for remote access via web browsers and mobile apps.
Multiple Viewing Modes: Supports various playback and viewing modes, including multi-channel view.
Power Supply:

Power Consumption: Typically consumes around 10W (without HDD) and 15W (with HDD).
Power Supply: External power adapter, usually 12V DC.
Certifications:
CE Certification:

Complies with European safety and environmental regulations, ensuring that the product meets quality standards.
RoHS Compliance:

Ensures that the product is free from hazardous substances such as lead and mercury, meeting environmental protection standards.
Compatibility:
Camera Compatibility:

Compatible with various Hikvision IP cameras and third-party ONVIF-compliant cameras, making it a versatile solution for diverse surveillance needs.
Mobile and Remote Access:

Supports Hik-Connect for mobile access, allowing users to view live footage and manage settings remotely via smartphones and tablets.
Integration with Other Systems:

Can be integrated into existing security systems for seamless operation, allowing centralized management of video surveillance across multiple locations.
Functionality:
Intelligent Video Analytics:

Supports advanced features such as motion detection, line crossing detection, and intrusion detection, enhancing the security monitoring capabilities.
Remote Monitoring:

Users can remotely access the NVR to view live streams, playback recorded footage, and manage settings via the Hik-Connect app or a web browser.
Backup and Export Options:

Offers multiple backup methods for recorded footage, including USB export, network backup, and cloud storage options.
User Management:

Supports multiple user accounts with customizable permissions, allowing for secure and controlled access to the NVR’s features.
Event Notification:

Sends alerts via email or mobile notifications in response to specific events, such as motion detection or system malfunctions.
Summary:
The Hikvision NVR DS-7604NXI-K1 is an advanced network video recorder designed for 4-channel recording in 4K resolution. Its robust features, including high compression standards, intelligent video analytics, and remote access capabilities, make it an ideal choice for a wide range of surveillance applications. With its compatibility with various IP cameras and compliance with safety standards, this NVR provides reliable and efficient video management for both residential and commercial environments.