Both tremolo and vibrato have a wonderful sound. Fine nuance adjustments and a wide range of settings are possible. There are no operational problems. VOX COOLTRON series VibraVox CT-06TR Analog tremolo & vibrato with built-in vacuum tube □ Depth, Ratio, Skew, Volume, Speed1, Speed2 (See image 8 for each effect) □ 3-way rotary switch for CH1, CH2 settings (Tremolo / Tremolo, Tremolo / Vibrato, Vibrato / Vibrato) □ True bypass □ DC9V center negative □ Vacuum tube (Electro-Harmonix 12AU7A/ECC82EH) ※ There are some dull marks due to the mirror finish. If you are concerned, please refrain from purchasing. ※ Only the main unit and manual are included.