Your nvr support onvif ? which version ?  

Yes, the latest version is onvif 2.3, and we will keep going the update.

Detect motion on onvif camera ?              

Yes, we have tested it with some brand, if IP camera support standard onvif protocol, the motion detection is no problem. In addition, we can support Hikvision, Dahua IP camera via SDK.

Mobile app for ios /android?                      

You can download VSS mobile, and try our demo account. 

CMS software for client ?                           

Yes, we have a free client software for NVR, you can down it and try from: http://www.sysvideo.cn/down/Sysvideo%20NVR%20CMS%20IMS200_Client_EN201408.rar

Support dual streaming in lan and local display ?   

Yes, we support dual streaming, and you can set the different resolution.

Show preview 4/8 channel  full hd real time in main stream 1920*1080 in local display and web lan ? 

Yes, not only support 1080P, we also support low bitrate and high bitrate auto switch. If you view multiple video on one screen, NVR will auto call low bitrate streaming, if you only view 1 / 4 channel video, NVR will auto switch to high bitrate streaming.

Play back in 2 models are 4 channel full hd 1920*1080 real time ?  

Yes, the decoding capacity depend on the model, our normal 4/8ch NVR SN7204 and SN7208 can support 4ch 1080P play back.

Record sound how channel and witch format ?  

The sound channel number are same with the video channels, the sound is from IP camera, the format  is G.711A