About Aggretsuko Retsuko is a 25-year old and single anthropomorphic red panda, who works in the accounting department of a Japanese trading firm. Facing constant frustration every day from pushy superiors and annoying co-workers, Retsuko lets out her emotions by going to a karaoke bar every night and singing death metal. The “Sweet” version of the Aggretsuko Otamatone is modeled after her deceptively sweet, more subdued work persona, while the “Rage” version is modeled after her edgier “aggressive” after-hours metal singer persona. About the Otamatone An adorable, quirky instrument whose sound has been described as similar to that of a synthesizer or theremin with a playing style resembling that of a string instrument, the Otamatone creates electronic tones that you can control based on the position of your finger on the touch-sensitive fretboard. Use a switch on the back to choose an octave and slide your fingers up and down to play different notes. Open the Otamatone's mouth with a squeeze to change the sound from a hum to an “ahh” and create a “Wah Wah” effect. A perfect toy for lovers of all things cute, silly, and weird, the Otamatone also makes a great gag gift, and a unique and amusing gift for violinists and other musicians. Size 5” x 14” x 3” Powered by Regular: 3 AAA batteries (Battery NOT Included) Includes Instructions Practice sheet NOTE*** Due to display differences, actual colors may vary slightly from what appears online.