... 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. ... Optional: 850/1900/1800/1900MhzDC Power supplyStandard adapter: DC 12V/1.5A Power CurrentMax:500mA Type :50mASIM CardSupporting ...