◆ Thank you for viewing! We will handle initial defects if any. ◆ Shipping to Hokkaido, Okinawa, and remote islands requires additional postage. Please comment in the comment section if you are in these areas. ◆ Product Description Size: 3cm x 8.5cm (including keychain: 15cm) x 2cm Weight: Approximately 46g Colors: 7 colors (Black, White, Pink, Blue, Purple, Yellow, Baby Blue) ◎ Please choose your favorite color! ※ This is a set of 3. Colors will be one color. 【130dB Loud Volume】 The loud volume makes it easy for others to notice! You can notify those around you. ※ 130dB is much louder than a police car siren. 【Lightweight & Waterproof】 You can attach it to your backpack or bag! 【LED Light & Reflective Sheet】 Easy to notify your location even at night! 【Battery Operated】 Can be used for about 2 years without charging! Can operate continuously for 6 hours! Two AAA batteries are required to use this product. 【Batteries and replacement screwdriver included, ready to use】 A screwdriver to open the battery cover and two AAA batteries are included. You don't need to buy them separately. ◎ How to use If, by any chance, you need help, you can sound the security alarm to alert those around you! Examples: When returning home, requesting assistance for the elderly or those with disabilities, commuting to work or school, robbery prevention, during disasters, outdoor activities