Electric Water Heater Controller Kit (240V), Home Automation Control of Your Heater with Z-Wave Leviton Light Switch Water heater controller using a Leviton light switch compatible with Z-Wave For manual/auto and remote control of a water heater up to 240V, 2-pole, 50 amp Only UL recognized components used in kit Designed and assembled in U.S. Compatible with Wink, SmartThings and Amazon Echo (requires Wink or SmartThings Hub)