BOSS Digital Multi-Track Recorder MTR "BR-900CD". Operation confirmed. It also runs on batteries. Equipped with 46 types of GT-PRO class COSM amps, Built-in guitar effects processor GT-PRO class COSM amp. The recording media is Compact Flash, 1GB allows for long recording of up to 520 minutes in Hi-Fi mode. External backup is possible by connecting to a PC. Supports up to 8-track recording and playback. With a 64V track configuration, there's plenty of room for recording multiple takes. Equipped with two XLR terminals that support phantom power. Also equipped with a rhythm machine that can program realistic drumming. Playback was possible with the built-in CD drive, but the process of burning audio sources has not been confirmed. Since it can be connected to a PC, the buyer can use the drive that comes with their PC to burn CDs. It's an old item. There are scratches and dirt on the exterior. Please check the photos. Instruction manual included. By reading it, you can master many functions.