... the PTZ protocol to assist the setting personnel to find out the control protocol and therefore easily target the problematic equipment ... L & Zoom) Control: Control the status of P/L, zoom in/out the camera, adjust the aperture, foci and setting parameters, run ... 7V DC2800mAh), more reliable, and work 15 hours Easy for use that the train is almost unnecessarySPECIFICATIONS MODELSTest-891IV CCTV Security ...