Check the listing for details. MXR M291 Dyna Comp Mini Compressor. Condition: New. Listed at 109.99 USD. MXR M291 Dyna Comp Mini Compressor The Dyna Comp Mini Compressor combines classic tone and modern convenience in a housing that's nearly half the size of the original, featuring an all-new Attack switch to toggle between slow and fast attack times. This pedal can be powered by a Dunlop ECB003 9-volt adapter, or the DC Brick™, Iso-Brick™, and Mini Iso-Brick™ power supplies (not included). Return Policy: Our return policy is 30 days from date of purchase, buyer pays return shipping in cases involving fully functional products returned for reasons resembling general dislike of the product, or no longer needing the product. In such a scenario there may or may not be a restocking fee. In the unfortunate event that a buyer has recieved a malfuctioning or broken product, we will replace the item or refund the buyer and provide a pre-paid return label in most cases. Feedback: If, for any reason, you have had a less-than-stellar experience purchasing from us, PLEASE CONTACT US PRIOR TO LEAVING NEGATIVE OR NEUTRAL FEEDBACK. Customer satisfaction and the resulting feedback is of upmost importance to us, and we will do everything we can to remedy the situation for you.