"A redesigned ST 900 compact quartz tuner with easy-to-read LED display featuring Lumibrite illumination. Pleasing rounded shape. The standard A4 pitch can be shifted in steps of 1Hz over the range 438 to 445 Hz. VU meter provides ultimate accuracy. LEDs provide additional assistance as tuning guides and note/pitch indicators. Extended 7-octave tuning range: C1 to B7. Includes input-output jacks, built-in microphone, AC adaptor jack, and automatic battery check function. Dimensions: 5 inchW x 1 inchH x 2-5/8 inchD. Black only. "