Gourmandies Bandai Demon Kimetsu No Yaiba Notification Zenitsu Yellow Slayer Buzzer, Agatsuma, KMY-21B,

When you pull the body, a sound will be heard. To stop the buzzer, push in the pin. Output volume: Approximately 85dB (measured 1m in front) Continuous blowing time: Approximately 20 minutes (using VINNIC CR2032 battery, test temperature 25°C) Battery: CR2032 type x 2 (test battery included)