The Yamaha GCT1 is a versatile clip-on tuner that is compatible with almost any instrument. The GCT1 features a contact pickup that can be clipped onto most instruments including electric/acoustic guitars, basses, horns, and woodwinds. Any pitched instrument that vibrates can be tuned with the GCT1. The GCT1's blue LCD screen is easy to read in well-lit or dark environments. The GCT1 also provides advanced features like a Flat Tuning Mode, and Calibration.