EmpireTech PTZ5A4M-25X if 25x can work for you. However if it was me, I would go with little better and Hikvision branded or an OEM might even work of the same.. DS-2DF8442IXS-AEL(T5) with a 42x zoom.. Same sensor as the Empiretech.. One you would need to use in ONVIF Empiretech and Hik if on your Hik NVR would use their protocol..