Cute green led light for dog collar. Fit for any size dog (small, medium or large dog). Clips onto the dog collar, is light weight. Great for independent dogs :) My sister uses this light with her dog Coco when they go for a walk at night. Coco doesn’t like to be on the leash, with this light she is always on eyesight. Pictures were taken at daylight. Light is more luminous at night. New never used. Smoke free home. Price is firm.