Alarm System, Access Control, Electromagnetic Lock manufacturer / supplier in China, offering 12 - 24V DC Voltage RFID 13.56Hz Frequency 26 out/in Interface Smart & Proximity Card Reader Metal Door Access Control, Battery Backup 12V 5A 4 Fused Outputs Access Control Power Supply with 12V7ah or 10ah Battery Access Control System, Electronic Remote Control Wireless Switch for Automatic Door and so on.