Time: Sets the time constants (Attack and Release). You can use the Darkglass Suite to fine tune and custom map the time constants, you can also assign different behaviours for each Mode. Output: Sets the overall output volume of the unit. Compression: Sets the overall amount of compression. This control also affects the internal makeup gain.Ratio: Adjusts the amount of compression. Mode: Selects the unit's Mode (BUS, FET, or SYM) USB: A Micro USB B connector allows you to connect the pedal to PC/Mac to set Time settings, parameters, and future firmware upgrades via the Darkglass Suite. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Parts & Accessories\Effects Pedals\Compressors & Sustainers". The seller is "imc_direct" and is located in this country: US. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.