The Korg CA40 Chromatic Tuner is a great value - with superior features like a large, easy-to-see, LCD needle-style display! The pocket-sized CA-40 features a refined design with a stand on the back that lets you place the tuner on any surface. With a wide range that covers A0 (27.50 Hz) - C8 (4186.01Hz), you can tune a variety of instruments with the CA-40, including wind, string, and keyboard instruments. Dimensions: 3.94(W) x 2.64(D) x 0.67 inches (H) Weight: 0.19 lbs. (88 g) (Including batteries) Included Items: Two AAA batteries.