Thank you for viewing. I purchased this new and have only used it at home. I haven't applied any Velcro or anything to the back. Below is the description from the manufacturer's website: Stereo delay pedal with three legendary delay algorithms Universal Audio UAFX pedals are a stompbox series that brings three classic reverb, delay, and modulation effects to a compact pedal, realized through the outstanding analog modeling technology cultivated in UAD plug-ins. With a powerful dual-processor engine and Universal Audio's renowned analog modeling technology, it delivers "authentic sound" that far surpasses other stompboxes. ・Flagship, uncompromising effect quality ・Equipped with three vintage effect algorithms in one pedal ・Stereo/Dual Mono Operation ・New algorithms can be added via download ・Classic design and Universal Audio's proud production quality ・True bypass ・Software also supports buffered bypass ・Analog through for dry signal ・Preset mode for stored settings 〇Main features of UAFX Starlight Echo Station A flagship delay effects pedal equipped with a powerful dual-processor UAFX engine. It features three legendary delay effects: tape, analog, and digital delay algorithms. ・Tape EP-III A unique 1960s tape echo machine that reproduces the condition of the tape and the preamp color. ・Analog DMM Faithfully reproduces the legendary BBD analog delay effect. ・Precision A pristine studio digital delay effect, well-regarded in the UAD plug-in library, with various parameters. ・Input jacks: 1/4-inch TS phone × 2 (Input 2 is for stereo connection) ・Output jacks: 1/4-inch TS phone × 2 (Output 2 is for stereo connection) ・USB port: Type-C ・Power: External AC adapter 9VDC