The AW-LT100M achieve an amazing battery life of approximately 100 hours using a single AAA battery. The body is lightweight, and triangular shuttle switches allow for intuitive operation. In a first for clip-type tuners for orchestral instruments, these tuners feature a color LCD that ensures excellent visibility. The AW-LT100M supports a variety of orchestral instruments The AW-LT100M is equipped with a large clip that can be attached to a variety of orchestral instruments such as a clarinet, sax, oboe, bassoon, horn, euphonium, tuba, cello, or contrabass. The double mechanism of a movable arm and a ball joint allows the tuner to be positioned at any angle you like. AW-LT100M specifications: Scale: 12 note equal temperament Range (sine wave): A0 (27.50Hz)─C8 (4186 Hz) Precision: ± 1 cent Reference Pitch: A4 = 410─480 Hz (1 Hz steps) Meter Speed: FAST, SLOW Power Supply: AAA battery x 1 Battery Life: Approximately 100 hours (tuner continuously operating, A4 input, when using alkaline battery) Dimensions (W x D x H): 60 mm x 65 mm x 68 mm/2.36" x 2.56" x 2.68" Weight: 36 g/1.27 oz. (including battery) Included Items:One AAA battery for checking operation