Mooer MTU1 Baby Tuner PedalA high precision tuning micro pedals, can be accurate to 1 points. Works with most Electric or Electro acoustic instruments including seven string guitar or five string bass. Display Uses 108 high brightness LED's and is visible even in strong light sun. Very small and compact design. True bypass switch. DC 9V. Specifications A high precision tuning micro pedals, can be accurate to 1 points Works with most Electric or Electro acoustic instruments