Hikvision 4 Channel 1080p AcuSense DVRiDS 7104HQHI M1 S Key Features: 4 channels and 1 HDD 1U AcuSense DVR Provides detailed information with face detection False alarm reduction through human and vehicle target classification based on deep learning. Key Features: 4 channels and 1 HDD 1U AcuSense DVR Provides detailed information with face detection False alarm reduction through human and vehicle target classification based on deep learning Efficient H. 265 pro+ compression technology