Pixnor Golf Putter Golf Automatic Putting Cup Travel Practice Putting Set Color: Black, green. Material: Plastic. Size: Approx. 26.7 * 16.5 * 5cm (L*W*H). Power by 2 * 1.5V C batteries (not included). Golf training aid, it can automatically return your golf balls. It is good quality and portable, suitable for indoor or outdoor use.