Chromatic Clip On Guitar Tuner - xiiTone XT-1 - Acoustic & Electric Guitar Tuner - Bass Tuner - Violin Tuner - Large Color Display That Rotates 360 Degrees - Professional & Easy To Use - Adjustable Frequency - Lifetime Warranty! LARGE EASY TO READ 360 Degree Rotatable Color LCD Display Preset Modes For Guitar, Bass, Violin And Chromatic Clip It On Or Use Built In Microphone For Stand Alone Operation Runs on a 3V battery (qty 1 x Cr2032 included in the box) Lifetime Warranty