The Nine Stars Auto-open Motion Sensor Infrared Trash Can Combo Pack is a great purchase! I liked the trash cans so much that I recommended them to two family members who also purchased them. All they need are batteries. The motion-sensor is quick and painless. If you have dogs who like trash, this is the item for you! Prior to making this purchase I looked around for other stainless steel trash cans, this was one of the best deals I could find!