Provides direct interfacing to reader hardware through their I/O ports.  Converts reader input/outputs to allow driving high current devices.  Compatible with AWID, Alien, Impinj, Intelleflex, Intermec, Motorola, Omron, Sirit, and ThingMagic with just a cable change.  Can provide 2 relat SPDT contact closures (reader dependent).  Requires using the specific reader protocol to drive the I/O.  Due to limitations of some readers, not all features of stack lights are provided.  Must specify reader at order time.  Includes 24V power supply and reader interface cable.