... / USB Ports GSM sms remote control system( 4 Input / 2 Output / USB Ports ) GSM sms remote control systemRemote switching machines with a ... Wellheads, boat, vehicle;13. Energy saving, street lights control system;14. Valve controls;15. Transformer stations; 16. Unmanned ... machine rooms;17. Control room application;18. Automation System, M2M;19. GSM Access Control System, GSM Gate Opener, etc ...