◆ Thank you for viewing! We will handle initial defects if any. ◆ Shipping to Hokkaido, Okinawa, and remote islands requires separate postage. Please comment in the comment section if applicable. ◆ Product Description Size: 3cm x 8.5cm (including key chain: 15cm) x 2cm Weight: Approximately 46g Colors: 7 colors (Black, White, Pink, Blue, Purple, Yellow, Baby Blue) ◎ Please choose your favorite color! 【130dB Loud Volume】 The loud volume makes it easy for those around you to notice! You can let others know. ※ 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 let others know 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 batteries are included. You don't need to go buy them separately. ◎ How to use If, by any chance, you need help, you can sound the security alarm to let those around you know! Examples) When returning home, requesting assistance for the elderly or those with disabilities, commuting to work or school, robbery prevention, during disasters, outdoor activities