Versatile & compact 3-in-1 provides accurate tuning & perfect rhythm. Biaxial swivel arm enables head-on view of the display. Display backlight function & 7 lights provide perfect tuning even when in the dark. Tuning range A0-C8. Reference Tones: C4-B4 (12 notes), Tempo Range: 30-250 BPM. Auto Power-Off, Backlight, Memory Backup, Volume Control.