Thank you for viewing. This is the YAMAHA MIDI data player, MDP-5X. ◆ By importing MIDI data composed in a DAW from a PC, you can play the music using the XG sound source included in the main unit. It is battery-powered, so it can be carried around, and it has various functions such as effects, mute/solo playback for each track, and loop playback of arbitrary sections. ◆ Operation has been confirmed. All items shown in the second photo are included. SD card for data input, AA batteries, and AC adapter are not included. ☆☆☆☆☆ The following is quoted from the product description site: From lessons to karaoke. Introducing a "palm-sized" mobile data player that makes music more fun! ◆ The mobile data player MDP-5 is a palm-sized MIDI data player. ◆ It also supports XG sound source and GS sound source formats. ◆ MIDI has transposition and tempo change, mute/solo functions, and is widely used as data for musical instrument lessons and karaoke. The "MDP-5" has achieved "palm-sized" portability so that you can utilize the benefits of MIDI in a wide range of scenes such as musical instruments / bands / karaoke. [Main Features] ● "Palm-sized" portability Palm-sized (168 x 137 x 50mm, 350g) body. The power supply supports both AC and dry batteries, and continuous playback of approximately 6 hours is possible with 4 alkaline AA batteries. You can connect headphones or external speakers and enjoy MIDI playback anytime, anywhere, regardless of location, such as outdoors or at presentations and live venues. ● Convenient and abundant functions for practicing musical instruments ・ Repeat playback: Repeat playback of a specified range is also possible. ・ Convenient for practicing wind, string, and percussion instruments, such as tuning (415.2Hz to 466.2Hz), transposition, reference sound output (A2 to A4), metronome, and count-in functions.