【Warning: Extremely Loud】 This alarm activates with a 140dB sound, immediately attracting attention and protecting you from danger. (Please note: This sound can damage hearing if listened to for extended periods. Please exercise caution when testing this product.) 【Portable】 Comes with a ring chain for easy carrying. Designed as a small accessory, it can be attached to bags and purses. 【Suitable for All Ages and Genders】 Easy to use for children on their way to school, commuters, those training at night, and mothers and fathers who enjoy walks. 【With LED Light】 In addition to the security alarm, it can also be used as an emergency light. It's a useful emergency aid when outdoors. 【Energy-Saving】 Operates on three LR44 button cell batteries. A protective seal is inserted; please remove the seal before use. If not using for an extended period, storing it with the seal inserted can extend battery life.