1 Door/2 Doors/4 Doors TCP/IP or RS485 Access Control panel support real time data transfer via internet. it was met with positive feedback from both dealer and user. we are one of biggest access control board products manufacturer in China, we provide a range of Access Control products, including Proximity Reader, UHF Reader, 2.4G ActiveReader, Single Door Access Controller, Time Attendance, Locks, Cards, Fobs, Tags etc.