... ,9,16,25,36, 64-channel mutile softwarre , no user limited professional software, centralized monitor, remote record and playback , Skype message ... , GPIOetc. SystemSystem requirementMicrosoft Win98 SE/ME/2000/XP, Vista,win7, Internet Explorer 5.0, NET4.5 or firefox,google browser CertificationCertificateISO ...