Powerful Phidgets API includes documentation for programming in COM, .NET, C, VC++, VB, Java, Flash and others
The Phidgets Relay Interface Kit 0/0/4 can be easily controlled through your computer's USB port using the Phidgets Application Program Interface (API). Phidget Interface Kit v7.0 with 4 Relay Outputs, rated at 250VAC, 10 Amps (100VDC, 5 Amps).