Thank you for looking! This is a "security alarm" that will give you peace of mind during your child's commute to and from school or when walking alone at night. [Product Features] High Volume 130dB: A loud alarm sounds by simply pulling the pin, alerting those around you to any trouble. LED Light Included: Equipped with a light that illuminates your path or keyhole when the button is pressed. Provides peace of mind on dark night roads. Easy Operation: A simple design where the alarm activates by pulling the pin and stops when it's reinserted. Even children can use it without confusion. Compact Design: With its cute egg-shaped design, it can be attached to a backpack or bag as a keychain without looking out of place. [Product Specifications] Size: Approx. 73mm x 42mm x 21mm (main unit) Weight: Approx. 30g (lightweight and easy to carry) Batteries: LR44 button batteries x 3 Color: White [Condition] New and unused. The item may have been opened once for inspection, but the contents are new, so please rest assured.