Thanks for both your input guys! There is also a GSM Relay Controller with 7 channels 250V 10A 50 Hz relay contacts. However, I didn't read anything about a quad band GSM receiver. In getting the industrial grade GSM Relay Controller I could update my project to stronger more powerful hardware, such as, a pump with requires 1/2 horsepower. I'm thinking to power the project with a single car battery.