Plus Ir Prox.Pad Plus - With Ir Communication - Fully Integrated Single Door Access Control System Combining Key Pad And Proximity Technology. Up To 2000 Users Per Door With Network Capacity Up To 32 Doors Per Site Via Ir Communcations Using Pda For Data Transport And Hub Managertm Professional Software (Included). 2000 Event Buffers Real-Time Clock 12-15 VDC Operating Power.