Key features - Total of 8 buttons: 7 scale keys for playing musical notes and 1 integrated music-playback button for instant song playback. - 18 built-in musical pieces: all 18 songs are programmed into the device’s microcontroller and cannot be changed. Why you need this product - Simple, reliable operation: the clear 8-button layout makes it easy for beginners and non-technical users to play notes and start songs without setup or programming. - Consistent playback: preloaded songs stored in the microcontroller deliver repeatable, predictable performance every time. - Focused functionality: dedicated scale keys support basic musical practice while the single playback button provides quick access to the device’s full song library. Practical advantages - Fast learning and practice: use the 7 scale keys to teach or practice melodies and scales with minimal distraction. - Low maintenance: fixed song storage removes the need for updates or file management. - Predictable for group use: the embedded song list and single-button playback make this unit easy to operate in classrooms, workshops, or group activities. Typical use scenarios - Early music education: introduce children to basic notes and melodies using a straightforward 7-key layout and preloaded songs. - Classroom demonstrations: teachers can quickly play examples or accompany lessons without connecting external devices. - Casual entertainment or background music: press the integrated playback button to start one of the 18 built-in songs for brief performances or ambient music. Important note - The 18 songs are permanently stored in the microcontroller and cannot be modified or replaced. The product’s functionality is centered on the 7-scale-key layout plus the built-in playback button for reliable, no-fuss use.