The Poway Medical Penlight is a top-quality diagnostic penlight suitable for use in medical, lab, and dental procedures. This penlight comes in a sleek black color and is manufactured by Opoway, a trusted brand in the industry. The penlight features a pupil gauge and ruler, making it an ideal tool for precise measurements and accurate diagnosis. It is perfect for use in a variety of healthcare, lab, and dental settings. batteries are included with this product, ensuring that you can use it right out of the box.