... door access, controlling gates, switching of remote equipments, car parking systems. Actually the GSM SMS Controller can be ... ;12. Wellheads, boat, vehicle;13. Energy saving, street lights control system;14. Valve controls;15. Transformer stations; 16. ... .Output Type2 Relay Output, 240VAC@3A, Relay inside.Exterior dimensionLXWXH 153x86x28mmBackup-battery3.7V 1200MAh LI-IONTemperature range-20° ...