... 1.D1 Resolution 2.With Audio Input W3-D3004CW 4CH Real-Time Standalone DVR Internet Surveillance AccessFeatures:* 4 channel PAL ... Resolution* Triplex operation: simultaneous playback/record/network* H.264 Real Time Playback* Self-defined bit rate and frame rate supported ... (Quad) Each: CIF,Half D1,D1:30fps/s(Real Time)Live Display Real Time, Single, QuadVideo Adjustment Brightness, Contrast, ColorAlarm ...