I've been using this for about a year, but I'm selling it because I no longer need a tuner. Operation has been confirmed. There is a feeling of use, but there are no problems with its use. A pedal tuner equipped with the high-performance buffer "ULTRA BUFFER". Despite its compact size, it achieves ultra-high precision of ±0.1 cent. It has 4 different meter display modes that can be set to suit the player's style.