BEST SELLING – One of Japan's best-selling musical Instrument Portable Synthesizer toys! FUN & EASY TO PLAY - You can create different sounds and pitches by pressing down the middle part of the Otamatone. By sliding your finger up and down, you can create higher and lower tones. Otamatone's face is made out of rubber, and by pushing his cheeks and making his mouth move around, the volume and the bass of the sound change. When you press the cheek, the mouth will open. It is a musical instrument, you can enjoy the sound. AAA Batteries ×3 Operated Size W2.63 × H10.62 × D5.23in ( W67 × H270 × D133mm ) Powered by 3 AAA batteries Includes Practice sheet, Test batteries * *English version: Test batteries are NOT included.