The Joyo Nebulous packs a big phase punch for a little yellow pedal. Some phasers like the old MXR ones only had one control - speed. The Nebulous adds Depth and Feedback to nail that tone you want. And it's all analogue, no digital sharpness here. Just warm watery classic tones at a price and size you can't argue with. Gory geek stuff here: The nebulous phaser splits the audio signal into 2 separate paths. One is unaffected while the other passes through 4 all pass filters and a LFO (Low Frequency Oscillator), these two signals are then mixed back together. As the Nebulous has 4 of these all pass filter it makes it a 4 stage phaser. Features: All Analog PhaserSpeed, Depth, and Feedback ControlsTrue Bypass Sturdy and solid. These were made to last. Dimensions: 1 1/2" W x 2 3/4" H x 1 1/2" D Uses a standard Boss style 9V AC Adapter (not included) Includes 3M brand Velcro to attach to your pedal-board! No Duty to Canada and USAFree Super FAST USA ShippingShips from Canada (If you live outside Canada and the USA, you will probably have to pay local import tax or Duties to the courier when your items are delivered. These taxes or custom duties are not imposed by us,and are separate from the purchase price, they are set by your county's tax laws, we can not mark items less than the actual value of purchase. Please ensure you find out what your local import taxes are before you order. We cannot refund an order because of these customs charges so please do not refuse the delivery at this point as you will likely not get your money back.Refusing the delivery of a package because you are not happy with the duty imposed is against e-bay policy.)