The innovative and stunningly complex all-analog Bucket Brigade Design of the Electric Blue II provides a range of unique and classic sounds. Warm or bright? Sounds from yesteryear, or sounds from today, and everything in between? The choice is yours. The controls are simple to use, while remaining effective and thorough, enabling players to explore analog modulation in a completely new way. The Electric Blue II's CHORUS mode delivers slow, traditional chorus sounds, to quicker effects that boarder on leslie-type sounds, and everything in between. Adjusting the SPEED knob affects multiple parameters, allowing you to perfectly dial Electric Blue II to capture every nuance, whether using slower or faster speeds. Whether you're searching for classic, warm vintage chorus, or clean, modern modulation, the Electric Blue II boasts an incredibly powerful tone! In many cases, VIBRATO is an effect that is born as a consequence of designing a chorus circuit. Mad Professor made it their mission to take the opposite approach, and dedicated themselves to building an incredibly expressive vibrato with a wide range of sounds and textures. VIBRATO mode in Electric Blue II is a completely unique design, that might be the most intelligent and intuitive vibrato available. The meticulously designed control layout, in combination with the ability to cater beautifully to distorted sounds, expands the flexibility and sonic possibilities like never before! Specifications 9VDC power supply input, 2.1mm plug center negative and positive sleeve. Current consumption at 9V DC: 35mA Voltage range: 8.5V-12V Input impedance: 500kOhm Output impedance: 1 kOhm True Bypass