◆ 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 applicable. ◆ 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 2. Colors will be one color. 【130dB Loud Volume】 The loud volume makes it easy for people 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! 【With LED light & Reflective sheet】 Easy to let people know your location even at night! 【Dry cell battery type】 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 dry cell batteries are included. You don't need to go buy them separately. ◎ How to use If, in the unlikely event, you need help, you can sound the security alarm to let people around you know! Examples) When returning home, requesting help for the elderly or people with disabilities, commuting to work or school, anti-robbery measures, during disasters, outdoor activities