A Band Instrument Favorite! The Snark Red Silver (SIL-RED) is able to detect an extended frequency range and can be used for all instruments including guitar. This tuner is chromatic, and senses the vibrations of the instruments it is attached to. In addition, it has an internal microphone that can be used for note detection in lieu of the vibration sensor. Use the MIC/VIB switch on the SIL-RED to select which note detection means you prefer. CR2032 (2 volt) battery included. - the manufacturer
The MIC/VIB switch is the main feature that separates this tuner from the SILVER SNARK 2, BLACK-SILVER, and ST8 SUPER TIGHT Snark tuners. - KD