1 Gang Bluetooth Switch Module

https://www.aihomestyle.com/products/1-gang-bluetooth-switch-module/

This 1 gang bluetooth remote switch Module enable you to remote operate your smart home through All-in-one Mobile App with no wifi connection. Support Alexa and Google Home. It can be used in lighting and household appliances, Such as refrigerators, water heaters, TV, air conditioner, electric fan, etc.