Features 1、Simple Operation:The keychain alarm has ON OFF switch, and features semi pull out design, which will not be completely pulled out, preventing false alarms and has a strong practicality. 2、Easy to Carry:This alarm features a keychain design, suitable for hanging on keyrings, handbags, backpacks, belts, or student schoolbags, making it portable and suitable for all those in need. 3、Applicable Scenarios: This safe alarm is suitable for various unsafe environments, falls, emergencies, accidents, kidnappings, and other scenarios, suitable for women, kids, and the elderly. 4、Battery Powered: The keychain security alarm is powered by 3pcs AG13 button batteries, with a capacity of 315mAh to ensure long term endurance, convenient to use anytime, anywhere. 5、Sound Alarm: The security alarm has a volume range of 125‑130dB, allowing you to quickly get help. It is the perfect gift to parents, students, and evening workers to ensure safe travel. Specification Item Type: Key Chain Alarm Material: ABS Battery Type: 3 x AG13 Button Battery (built in) Battery Capacity: 315mAh Volume: 125-130dB Package List 1 x Key Chain Alarm