This is a homemade switch. Pressing the main body activates it, allowing you to operate toys and electrical appliances connected to the switch. Furthermore, when the toy is activated, the main body vibrates simultaneously, providing tactile feedback to the user that they have "pressed" the switch. This is a device designed to support individuals with physical disabilities, such as those with cerebral palsy or muscular dystrophy. It is intended for use in special needs education, caregiving, and therapeutic settings. It uses two AAA batteries. (Batteries not included) Please note that this is a homemade product, and there is no guarantee of long-term durability or resistance to strong impacts. Also, there may be some scratches from the manufacturing process, so please be aware of this beforehand.