**Product Description** - **Advanced H.264 Compression & Versatile Camera Input** This DVR system features **H.264 compression mode**, ensuring **efficient video storage and smooth playback**. It supports **4-channel real-time 1080P AHD input** and **analog standard-definition camera input**, or a combination of **2-channel HD input + 2-channel SD input**, providing **flexible compatibility with various camera types** for enhanced surveillance. - **Full HD 1080P Recording for Crystal-Clear Footage** Designed to deliver **high-definition video quality**, this DVR supports **1080P full HD recording** with optional resolutions such as **1080P, D1, and CIF**. Capture **sharp, detailed images** to ensure **optimal monitoring and security** in any environment. - **Wide Voltage Input for Universal Vehicle Compatibility** With a **wide voltage input range of 8V-36V**, this DVR is compatible with **most vehicles**, including **cars, trucks, buses, and other transport systems**. The robust voltage support ensures **stable operation**, making it ideal for **both personal and commercial vehicle surveillance**. - **Dual Storage with HDD & SD Card Support** This DVR supports **HDD + SD card data recording**, allowing for **maximum storage capacity of up to 2TB on a 2.5” hard drive**. Enjoy **extended recording time and secure data storage**, ensuring that **critical footage is always available when needed**. - **Exclusive Pre-Allocate DVR File System Technology** Featuring an **exclusive pre-allocate DVR special file system**, this technology **prevents file fragmentation caused by repeated data overwriting**, ensuring **data integrity and smooth continuous recording**. This advanced system enhances **reliability and security**, making it a **high-performance solution for vehicle surveillance**. Upgrade your vehicle’s surveillance system with this **powerful, high-definition, and reliable DVR**, offering **seamless recording, wide compatibility, and secure data storage** for enhanced security and peace of mind.