Plug & Play supported.
	
Multi stream supported.
	
Mobile remote surveillance. (iPhone/ iPad/ Android)
	
2 way audio. (conference)
	
Recording retention function supported.
	
USB or remote firmware upgrade supported.
	
Support 4 CH playback. 1 / 4  CH
	
Network online user management.
	
Multi-user online simultaneously.
	
Recorded file protection supported.
	
IE browser supported. (Windows)
	
Support ONVIF / RTSP connection