High Precision Chromatic Auto With Lcd Display For Guitar Bass Volin True, 14. Fast Accurate: Experience speedy tuning with +/- 1 cent accuracy. Housed in a mini pedal that's designed to fit on any pedalboard, it lets you to spend less time tuning and more time playing. Easy to Read: This tuner pedal is suitable for wide range tuning. LED Light indicator shows the working state. Deluxe LED display leads clear results of tuning. Tuning range is A0(27.5Hz) ~ C8(4186Hz). True Bypass: Improved analog circuit, real signal, true bypass for zero tone coloration. Solid Construction: This tuner pedal is made of high quality zinc alloy, durable and sturdy. Mini size will save lots of space on your pedalboard. It?s suitable for seven strings guitar or five string bass. NOTE?The 9V power adapter is not included.