Introducing the 3+1 Fan Retrofit Switch, an innovative and convenient way to upgrade your home's lighting system. You can control 3 switches and 1 Fan. Product also comes with manual regulator to control fan with manual regulator as well.This retrofit switch is designed to be easily retrofitted into your existing switch boards, allowing you to control your lights with your smart phone via wifi/bluetooth. Made in India with a robust design. The retrofit switch also allows scheduling, and even works without internet. Plus, enjoy great after sales support and 1 year warranty for peace of mind. Upgrade your home with the 3+1 Fan Retrofit Switch today!