Idea of Jalousie Icon
The image is a rectangle that looks like a window. Across the top of the window are horizontal bars like blinds. There is a dotted chain hanging from the right side of the blinds. The end of the chain has a bigger dot than the rest of the chain.
This is a Jalousie icon. It is available in PNG and vector. Downloading is free for PNGs up to 100x100px.