Introducing the Hourglass" Dual Compressor Pedal - Unlock timeless sustain and endless creativity with dual, independent circuits inspired by the legendary Ross compressor. When Jackson Audio first introduced guitar players to a dual optical compressor pedal with The Bloom in 2018, they learned quickly that players needed it. It became the ultimate tone shaper for country, funk, PnW and slide players. Ideal for switching guitars, having an always on setting and of course infinite sustain. The Hour Glass makes dual even better by giving the player full independent control over two analog, vintage inspired OTA style compressors that can be set and engaged on the fly. Choose from Fast, Medium, or Slow Attack time options to tailor the pedal's response to your playing style, and use the Treble toggle switch to select Flat, Medium, or High boost options to help shape your high-frequency tones. Set one compressor for your single coil guitars, the other compressor for humbucker guitars and have precise tone and dynamic shaping when you switch guitars! Both compressors can also be engaged simultaneously for endless sustain! Discover the freedom of expression with two independent circuits, that maintain the transparency of your guitar's tone. Precision controls for Level, Sustain, and Blend on each circuit allow you to sculpt your sound exactly as you desire. "¢ Comp: Amount of compression and sustain. "¢ Blend: Mix of dry signal and compressed signal. "¢ Vol: Overall volume of each compressor circuit, can be used to boost your signal. "¢ Attack switch: for Fast 100ms, Medium 400ms or Slow 1600ms attack mode. "¢ Treble switch: Select Flat, Medium or High treble boost frequencies. "¢ LED color: Blue for comp 1, Red for comp 2, Purple for both. "¢ Power: 9 - 18 Volts DC."