Mircom TX3-CX-4K-A Four Door ControllerFour Door Controller kit with IP module, four Proximity Readers (TX3 P300 HA), four proximity graphic card, two transformers, Configurator software and a USB cable. Provision to add two additional 2 door controller boards. The TX3 CX 4K A controller conveniently houses two 2 door controller boards providing a 4 door system kit. The chassis can hold up to four 2 door controller boards in total, providing the provision to add two additional 2 door