Tuning Range from A0 (27.5Hz)—F6(1396.913Hz) guarantees precise tuning in a relatively narrow range suitable for guitar bass and ukulele. The clamp can be rotated up to 180° to find your preferred viewing angle. The FT01 tuner is gravity sensitive and the display will always adjust to face the proper direction allowing you to mount it as you wish. The tuner will enter power-saving mode after 10 seconds. After 2 minutes it will turn off automatically. Powered by a lithium metal (included) CR2032 battery. A bright and colorful display and mechanical clip allow users to tune quickly and comfortably even on dark stages or in direct sunlight. Light & Highly Compact: The tuner almost hides behind the headstock blending into the instrument and is small enough to be kept on your instrument while stored in its case.