8 Instrument Sounds & 10 Keys: Musical mat with 10 piano keys, 8 musical instrument sounds(Piano, Violin, Accordion, Trumpet, Vibraphone, Oboe, Guitar, Flute), 10 demos, one key one note, record & playback function. sanmersen piano mat can stimulate kids’ hearing development, help identify colors, animals and notes. Adjustable Volume: The volume can be adjusted on the music piano mat, to choose comfortable volume outdoor or indoor. Piano mat for toddler is easy to wipe clean, durable enough to withstand endless jumping. Open the floor piano mat switch and move your kids feet or hands to the beat.