Cvision 2015 Newest Plug & Play Super Mini NVR 4CH(1080p/960p/720p)Network HD Video Recorder Support ONVIF Plug and Play external recording via ESATA or USB Remote Access via Smartphone, Tablet, PC and Mac ONVIF Compatible with main brand IP cameras: AXIS, SONY, Panasonic, SANYO, BOSCH, SAMSUNG,Honeywell, VIVOTEK, Ambarella, HIKVISION, DAHUA, Histream, Grandstream, TOPSEE,Launch, WISION, HYVISION, WAPA etc.; VGA and HDMI monitor outputs.Please format the HDD for compatibility. Please check if your ip cameras support the "Onvif" protocol. Our Units do not support the USB HDD Full Real-time 4CH(1080p/960p/720p) NVR