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 play it as a MIDI instrument using external sound sources. Unlike Bluetooth connections, there is almost no lag between playing and sound production. - Model Name: midi EWI - Color: White - Tones: 10 types (alto saxophone, soprano saxophone, clarinet, pan flute, trumpet, violin, harmonica, flute, bamboo flute, recorder) Sound produced from the built-in speaker - Charges with the 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, when connected to a computer or smartphone with a USB cable, it is recognized as a MIDI device. 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 low-latency (no time difference between operation and sound production) playing with the sound source on the computer side, better than "ele-fue". Since it has been used infrequently, it is in good condition. Thank you for looking.