"Small and Easy-to-Use LCD Clip-on Tuner" Popular clip-on type This clip-on type is easy to use in any situation. It can be used for guitars, of course, as well as bass and ukulele tuners. It features a "backlight" function for easy viewing on a dark stage, and an "auto power off" function to prevent battery drain. Includes lithium battery CR2032x1 (for function check) No box, body only Main Specifications Width x Depth x Height: 56mm x 31mm (including clip) x 32mm Weight: 28g (including battery) Display: Backlight Tuning Modes: CROMA/GUITAR/BASS/UKULELE Pitch Measurement Range: A4 = 440Hz Tuning Range: A0~C8 Other Control Functions: Auto Power Off