OD-11 user guide in english July 05, 2021 14:28 Updated Click here to get to the OD-11 user guide in english. Related articles OD-11 - how do i updated the software? what does the function button do? OD-11 - how loud can i play on it? OD-11 - how do i setup OD-11 for the first time? i purchased my unit from a retailer, who do i contact?