Access Control Module 2 Door Expansion - board only - Add on 2 Door PC Board for "2DM and 2DMPL" models - 4 Wiegand Readers - In/Out, 4 Form C Relays, 6 programmable inputs NO/NC - Bundle includes 2 NEA-MI-RD-M Readers - 1 NEA-MI-ISO-CRD-25 and 1 NEA-MI-FOB-25