Thank you for viewing. Please note that I will not negotiate on the price. Although it is a beautiful item, it is a used item, so please refrain from purchasing if you are concerned. No returns or refunds, please. The Vertex Ultra Phonix MK II is a high-quality overdrive pedal with LEVEL, DRIVE, and FILTER controls. It's a so-called Dumble-style overdrive. - Model Name: Ultra Phonix MK II - Brand: Musette Japan - Type: Overdrive - Controls: LEVEL, DRIVE, FILTER - Output: MASTER - Accessories: Box, Instruction manual From the sales site: The Vertex Ultraphonix MKII recreates the tone of the Dumble Overdrive Special (ODS) amplifier, a legendary guitar amp that remains a mysterious presence, in a compact pedal. It has been downsized by 33% from the original Ultraphonix model, which has already received high praise. The newly added "RATIO" control allows for exquisite sound making, blending clean tones with the overdrive that characterizes the Dumble amp's tone. While retaining the superb overdrive tone of the original Ultraphonix, it allows for more comprehensive tone shaping. CONTROLS MASTER: Adjusts the pedal's output. LEVEL: Adjusts the input gain. RATIO: Blends clean and drive signals. FILTER: Emphasizes frequencies from 800 to 1.6kHz.