With superior features like a large, easy-to-read LCD needle-style display, the compact CA-40 Chromatic Tuner is a great value! With a wide range that covers A0 (27.50 Hz) - C8 (4186.01 Hz), you can tune a variety wind, string, and keyboard instruments. The pitch and range are detected quickly and accurately, and you can use the built-in, high-sensitivity microphone to detect the pitch of an acoustic instrument without requiring any other equipment. An output jack (bypass) has been added, making it easy to check the tuning even while you perform. The pocket-sized CA-40 features a refined design with a stand on the back that lets you place the tuner on any surface.