This video from North Carolina the USA says about itself:
30 September 2017
Having a blast with the new Window Bird Feeder, MOOKZZ Clear Acrylic Design attached to my window above the PC. A virtual black-capped and Carolina chickadee and titmouse magnet with black oil sunflower seeds. You can watch them from dawn till dusk – amazing. I will upload a full test of this feeder and more videos of bird behavior using this feeder in the coming week. Stay tuned this is going to be fun!