Fully chromatic! This clip-on tuner from D'Addario can be used with acoustic guitars, electric guitars, basses, ukulele, and many other instruments. While it is an affordable tuner, this doesn't mean you have to compromise! The Eclipse tuner offers fast, accurate tuning on and off the stage. Features full color vertical display, auto power-off, and pitch calibration in a compact design. A cleverly designed swivel allows you to zone in the perfect viewing angle for your tuning needs and can even be mounted behind (or in front of) the head stock. A coin battery (CR2032) is included.