The JBS-100-ECW-A is programmable an electronic temperature controller that provides accurate control for all heating cables. Programmable to maintain temperatures of 425°F (218°C), can be used with voltages from 100 to 277 Vac, and is capable of switching current up to 30 Amps. The kit contains all the necessary materials for a complete installation. For a direct connection to a RAYCHEM MI cable, eliminating the need for a field power connection device, a grounding kit is required (ordered separately).