SMS MONITORING: Advanced SMS system to enable you to monitor and control your vending machine from your mobile phone. You can manage and operate the vending machines under your fingertip from remote distance 1,000 miles away from installation site!!! GSM module: 850/900/1800/1900 MHz Power supply: 12VDC Power consumption: Standby 1Watts, Operation: 3.5Watts (Max.) FEATURES: 1 or 2 counter input to connect with coin acceptor or water pulse meter. 7 or 6 input logic to connect with water sensor and logic sensor in the vending machine. 3 output relay to control ON/OFF electric device in the vending machine. Can send alert message to maximum 4 mobile phone number, PASSWORD to protection. GSM monitoring system enable you to operate and control water vending business smartly via your mobile phone