Roland Digital Wind Instrument Aerophone AE-05 Aerophone GO No instruction manual or box. Power turns on. I am not familiar with musical instruments, so please comment if you would like to see photos of specific parts. ~Quoted from the internet below~ The lightweight and compact body incorporates a built-in speaker and supports battery operation, allowing you to play it casually anywhere. You can practice at night because you can play without making any noise to your surroundings by using headphones. Tones: In addition to four types of saxophones: soprano, alto, tenor, and baritone, it is equipped with various tones such as flute, clarinet, violin, and synth lead. Operability: With a button layout based on the saxophone key arrangement, you can play it casually like a recorder. The reed-structured mouthpiece has a built-in highly sensitive bite sensor, allowing for a variety of expressions through breath control. Other: A compact dedicated carry bag is included, making it easy to carry. It can be used continuously for about 10 hours with 4 rechargeable nickel-metal hydride batteries (AA size).