This instrument tuner can be used to tune a wide range of instruments like guitars pianos accordions organs flutes and violins. It is even able to tune the two tones of beating instruments like the accordion at once. This instrument tuner is accurate fast and easy to use. It runs on a pc or laptop and uses the microphone thats connected to the soundcard. It can also use an internal microphone like most laptops have. This chromatic instrument tuner is fully automatic. It measures sound using the microphone and detects the tone that is played. The detected tone is compared with the nearest tone in the scale. The deviation of the tone is displayed using an easy to read gauge. Take a look at the website for a detailed description of all the features.