Establish in 1997 we produce the security products begins  byoffline or TCP/IP network access contronller,RFID Reader and TCP/IPcamera time attendance,and access control, DVR integrated terminal.we had established a nationwide sales and service network, branchoffice we have in Beijing,Shanghai,Shandong,Hunan,Sichuan.Also,Most of our prodcuts exported to Europe,USA, UK, Hongkong,Taiwanand other regions and countries. if you have any question can contact me at any time. Email:[email protected]    [email protected]     SKYPE: danyhou1040/[email protected]Â