Bought as a gift, but not used. Only opened to take photos. Here's the manufacturer's bumf... Features: 100% Analog Envelope Filter/Auto Wah by Picking Dynamics Designed for both Guitar & Bass with Fast and Accurate Tracking Wide Range Funky Tone Shaping with 4 useful Knobs True Bypass Footswitch keeps a clean Signal Path Working with 9V Center Negative Regular Pedal Power Supply(not included) UK Mainland Postage Only
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