Power supply: 5-15VDC
Consumption current: ~25mA (12VDC)
Switched external voltage: 0-30VDC
Switched max current: 200mA
USB type B connector
RF connector for GPS antenna: SMA-F
Outputs: 8 relay outputs and 8 TTL (3.3V) outputs for an external relay module
Description and source code is here.
If you need other configuration, please write to me.