Come and see our amazing products. The self-cleaning slicker brush with a smart button can make it easy to remove the waste hair off from brushes. Through clicking the black button, the needles of dog brush could stretch out for hair brushing and retract for fur mats collecting and cleaning. This product is strong and durable, allowing you to brush time and time again. Pls confirm further with us if any query about packing info, inventory status and time schedule.