This mobile client software supports DVR whose program version is updated after June 25(repairing the DVR crash occasionally problem), if the DVR's program version is before June 25, please select the old IMSeye . Features: 1. Address Book 2. Channel Control 3. Remote Play Back 4. Password Protection 5. PTZ Control 6. Real-time Alarm 7. Audio Function 8. other Manage functions Please read the user instruction before you use the app.