Home Super4 USB Relay Module Super4 USB Linux Software Super4 Windows Software USB Thermocouple Module    Solid State Relay control   Top16 Input-Output Module     Distributors                               Welcome to tctec , we manufacture : Reliable, low-cost, USB input and output solutions. Relay modules   3 X super4 USB Relay modules   Please contact: sales - sales @ emx.net.au website - admin @ emx.net.au   All rights reserved 2008 tctec Pty Ltd