Operation confirmed as of 2025/12/12. Only the volume knob (far left ↑) is looser compared to the other knobs. It has many scratches overall due to heavy use, so if you are concerned, you may want to purchase a cover on Amazon or similar and replace it... Instruction manual included. Adapter included. - Model: SP-404SX - Brand: Roland - Function: Sampler - Connectivity: USB connection - LED Display: Digital display Thank you for viewing.