Features Dual Real-Time Recording: up to 120 (NTSC) / 100 (PAL) fps & at 720p HD Resolution 1080p Full HD Resolution Recording Support: high-definition displays De-Interlace Function: for clear edge of moving object Multiple Audio Channels: 4ch audio input and 1ch audio output 1TB Raw Storage DVD-RW, USB Back Up Support: to store important files to external devices Max. 4 Internal HDD: 4 internal hard disk for more recording space This product delivers professional-grade performance, reliability, and seamless integration for modern security systems.