The NUX NTU-3 Flow Tune MKII features 4 tuning modes including Chromatic, Guitar STD, Guitar CPS, Bass. Enhanced for guitarists, the NTU-3 includes Guitar STD(Standard) and Guitar CPS(Compensated). Flow in Tune There are 3 display modes including a Strobo mode and 2 Arrow modes. The featured display is vivid and looks like a flowing river! Simply flow in tune with your guitar. Bright display in both of sunlight and darkness With a bright and high-definition LCD display, the NUX Flow Tune works well on any stage in both of sunlight and dark environments. No matter where you are performing, you can check your tuning on the LCD very well at a distance and keep your instrument in tune all the time. On the FLOW TUNE, you can switch between TB (True bypass), BF(BUFFER), and BFM (BUFFER MONITOR), according to your tastes and environment. The FLOW TUNE not only features a true bypass for outputting the sound exactly as it was inputted, but now includes built-in BUFFER/BUFFER MONITOR modes. Most electric guitars use passive pickups with a high impedance output. When using a cable, there is a perceivable loss of tone, usually high frequencies, after about 6 m (around 18 feet) and this problem gets worse the longer your cable. A buffer boosts the signal over long cables to avoid loss of tone, keeping it clean and clear – even when your pedal is off. The BUFFER enhances the sound quality in bypass mode, so that you can still maintain superior audio quality even when using a long cable to connect to the tuner, or when inserting the tuner into a complex effects board. And with the BUFFER MONITOR mode, you can even monitor all the notes you play in real time. Fits Any Board Compact size and steady weight, easy to fit the pedalboard with Velcro. Additionally, the specially-designed footswitch offers comfortable pressing feedback.