Guitar & Bass Trainer/Recorder For solo guitar practice. You can register songs or karaoke tracks on an SD card beforehand and practice based on them. I bought this several years ago and used it a few times after setting it up, but I couldn't improve my skills, so I've had it stored in a box ever since. I'm selling it now. The main unit comes with all the accessories (two AA batteries, one USB cable, instruction manual, and one 2GB SD card). The SD card is built-in. I've included a reference song for operation check, so please delete it after confirming the operation. The AA batteries are new at the time of listing. It's in generally good condition due to the low number of uses. - Brand: TASCAM, - Model Name: GB-10, - Function: Guitar & Bass Trainer/Recorder, - Input Terminals: Guitar Input, - Output Terminals: Line Out - Power Supply: Dedicated AC adapter, USB bus power, or two AA batteries - Display: LCD display Thank you for looking.