This is the third generation SwitchBot curtain. I am selling it because it didn't fit my home's curtains. Product Overview: SwitchBot curtains are a convenient device for smart home automation. This is a set of two, and it can automate your existing curtains. [Included Items] The instruction manual and installation tools are included, making installation easy. All necessary parts are included, so you can start using it right away. - Brand: SwitchBot - Model: Curtain - Included Items: Instruction manual, complete installation tools - Color: White - Quantity: 2 - Instruction Manual: Yes Thank you for looking.