This security alarm is perfect for entering school or kindergarten. [Includes Japanese instruction manual.] Features an LED light for peace of mind on dark roads. Product Name: Personal Alarm AJ-9400 Size: Diameter: approx. 9.2cm (pin retracted) Thickness: approx. 2cm Maximum Width: approx. 3cm Batteries: AAA alkaline batteries x 2 (test batteries included) - Color: Black - Volume: 130dB ★Regarding product comments and purchase handling ・We apologize, but we will only respond to inquiries and process purchases on weekdays until 3 PM. ・We are unable to respond on weekends and holidays. ・Please understand that there may be delays in our responses and shipping.