4-channel Stand Alone H.264 DVR 2 channel alarm input, 1 channel alarm output Details:1. H.264 Compression2. Adjustable 5-level bitrate,Adjustable image ... or PATA, 1000G more)Bitrate5 Levels: 150MB/H, 200MB/H, 250MB/H, 300MB/H, 1~1000MB/H Self-definedPasswordEncrypted by 128-bit Numerical Digits with ... < 90%Device Dimension350 x 272 x 58 mm (W*D*H)Packing Dimension390 x 345 x 142 mm (W*D ...