Although the device from the outside is not particularly solid impression, but the content speaks for itself very! The tuner has three options: 1) With the "G / B" button you can choose whether you want to tune a guitar or a bass guitar. 2) In addition to the set mood you can adjust the tuner so by repeatedly pressing the "Flat" button that you can tune the guitar by up to 5 semitones lower. 3) The machine prints by repeatedly pressing the "Sound" -Knopfs against the adjusted sound for each string. This function is also possible in conjunction with the "flat" button. The tone detection of the device is very good. Firstly, the device detects the sound of the guitar string is played when one alludes the guitar string close to the unit, on the other hand, the device also has a cable connector to the tuner to an amplifier to connect. Thus, the device is very good for acoustic and electric guitars suited. A highly recommended device!