This is a Roland Mobile BA amplifier. The product includes the main unit and a third-party AC adapter. A new carrying strap is provided. Please attach it yourself. Regarding the appearance, there are minor scratches, but no noticeable ones or stains (in the seller's subjective opinion). This unit has inputs for a microphone, line input, and PC/AUDIO input, allowing connection to a PC or smartphone. I have confirmed the operation of the LINE, microphone (dynamic), and PC/AUDIO inputs using the AC adapter and batteries. There is no crackling, and there are no functional problems. You can buy it immediately. I do not offer holds, dedicated listings, or face-to-face transactions. The person with the strongest intention to purchase will be given priority, even during negotiations. Shipping may take 1-2 days as processing will be done after work and upon returning home. Thank you for your consideration.