EAS Control Kit Compatible w/ CS2/CTS2/CTS3 Edge ProductsCompatible w Edge CS2 CTS2 CTS3 The EAS Control Kit gives user the ability to monitor EGTs and adds the power switch to control multiple accessories with an On Off digital power switch. The EGT probe is a sensor that allows users to monitor critical Exhaust Gas Temperatures to ensure added power is not creating excessive heat which, in turn, can cause engine damage. This kit is ideal for the daily diesel driver or if you are towing then it's a must