1.High quality and security 2.Real time supervision 3. Control 4 doors 4. ... Size24x13.5x5.5cmAccessoriesUser Manual, warranty cardFunction IntroductionConventional Functionoffline operation; real time supervision; photo display; mass storage; flexible user ... line, software, manual, certificate, key(2pcs), cartonAlarm for long time door open, ilegal break in, intimidateYesFire and alarm linkageIf no ...