This Rocket guitar clip-on electronic tuner makes tuning easy with its rotating clip so you can tune with comfort. There is frequency range from 27.5 ? 1760 Hz. and the precision is spot on for quick and easy accurate tuning. Suitable for all players of all ages this little tuner is easy to use compact and portable. It also has a tuning accuracy feature to help ensure you can tune quickly and perfectly and the string indicator alllows you to tune each string to the note you need.