This is a compact and lightweight wind synthesizer. You can play it using the built-in speaker. Also, by connecting it to a computer or iPhone with a USB cable, you can use it as a MIDI instrument to play external sound sources. - Model Name: midi EWI - Color: White - Tones: 10 types (alto saxophone, soprano saxophone, clarinet, pan flute, trumpet, violin, harmonica, flute, bamboo flute, recorder) - sound emitted from the built-in speaker - Charges with included USB cable (USB-MIDI connection possible) - Accessories: USB cable, storage pouch, instruction manual (Japanese), spare mouthpiece x 1 ◎ Although not mentioned in the instruction manual, it is recognized as a MIDI device when connected to a computer or smartphone via USB cable. I have confirmed that it can be played on a Windows 11 computer and an iPhone. The seventh photo shows the screen of the free software MIDIberry on Windows, and it is recognized as "USB MIDI [1]", allowing for playing with lower latency (no time difference between operation and sound) using the sound source on the computer side, compared to "ele-fue". It's in good condition because it hasn't been used much. Thank you for looking.