Especially design for the monitoring system 450TV lines of horizontal resolution I2C bus control and easy to operate 2 channels composite video input/output (BNC) 2 channels audio input/output (RCA) Built-in loudspeaker and the maximum power consumption is 1W Anti-interference metal cover Complexion correcting function under the NTSC system NTSC/PAL automatic selectable AC90V～265V power supply, 50/60Hz