Everything you need to start or expand your access control system Access Control Starter Kit: Package includes EntraPass Special Edition software; KT-300 door controller (1); ioProx P225XSF readers (2); ioProx P40KEY keytags (5); USB-485 converter (1); Form C relays (2); 12V, 7 amp battery (1), and 16 VAC, 40 VA transformer (1) Access Control Expansion Kit: Package includes KT-300 door controller (1); ioProx P225XSF readers (2); 12V, 7 amp battery (1); 16 VAC, 40 VA transformer (1), and Form C relays (2)