4-in Tester: 2*BNC port (video in and video out), 1*RS485, 1*Micro USB, 1*Audio In, 1*Reset, 1*12V/1A output, 1*charge input; Supports: IP/HDCVI/ AHD/ HDTVI/ CVBS; Video Input/output: BNC, Audio Test, PTZ Control | DH-PFM900-E | 819290021745