H.264 compression,4 channel standalone dvr,support SATA HardDisk, Mouse,USB,network,IE browse FEATURES:• Stand-Alone DVR, H.264 Compression • Playback ... resolution: 4 x CIF• Support capacity 2000GB• High quality video ... x 44 mm (W*D*H)WeightN.W:2.5KG G.W: 2.8KG 4 Channel Standalone DVR, H.264 Compression DV-7504