Please read the following description and profile. [Manufacturer] LEKATO [Model Number] PA-1 [Condition] Used [Accessories] None (body only) This is a headphone amplifier for guitars. Although I haven't used it much, there are signs of use such as scratches. I have not connected it to a PC or used a USB cable to connect to external devices, so the operation has not been confirmed. - Startup - Charging - Switching tones and presets - Tuner function - Bluetooth connection with smartphone - Audio output from headphones I have confirmed that the above functions work without any problems. Shipped via Rakuraku Mercari. The following is quoted from Amazon: [10 Pre-amps and 10 IRCAB Models and Multiple Effects] LEKATO all-in-one headphone amp model with multiple effects (including overdrive, distortion, chorus/phaser, delay and reverb), 10 modeled amps and 10 impulse response (IR) cabinets. [Bluetooth Receiver to Play Background Music] LEKATO pocket guitar amp with Bluetooth receiver function that transfers music signals to guitar headphones or speakers (not compatible with Bluetooth headphones, wired headphones are required). [Create Your Own Personality Tone] You can individually adjust various effects and free up collocation, and save all the changes you made to the channel for further use.