... .D1 Resolution 2.With Audio Input W3-D3004CW 4CH Real-Time Standalone DVR Internet Surveillance AccessFeatures:* 4 channel PAL/NTSC Video Input ... fps(Quad) Each: CIF,Half D1,D1:30fps/s(Real Time)Live Display Real Time, Single, QuadVideo Adjustment Brightness, Contrast, ColorAlarm Input/Output ... ) mmOperating Temperature -20°C ~ +60°C W3-D3004CW 4CH Real-Time Standalone DVR Internet Surveillance Access