The MTC+2 is the perfect starter kit for the boater looking to build a complete remote monitoring system. The starter kit includes the MTC, two Wireless Sensor modules, and three interchangeable attachments to monitor battery, high water, and an entry hatch or door. Additional wired or wireless sensors can be added to expand the system: Monitor battery voltage, bilge activity, high water, temperature, and engine to make sure systems are functioning properly Track GPS position and set geo-fences to know where your boat is at all times Control your lights, A/C, and countless other systems from anywhere Secure your boat by connecting to entry alarms and motion sensors