Advantages of this system:
1 Auto-control circuit  Mirror defogger switch is auto triggered on by the hot running water, and deactivated once the hot water switch is off.
2, Remarkable Energy Saving 90% energy is saved due to automatic control system, especially in hotels and resorts etc.
3, Easy installation the water electromagnetic valve is with screw thread connection, easy to install.
4, product is durable & reusable.  Water switch is made of copper, which is durable, and can be re-used in the next innovation step to save building cost.