1. Loud alarm sound of 130 decibels: This self - defense keychain alarm can emit a loud sound that can attract others' attention even from a long distance. In dangerous situations, it can effectively scare off attackers and seek help from those around. 2. LED light design: This safety alarm keychain is also equipped with an LED light, which can provide illumination in the dark. It is suitable for outdoor activities such as night running, walking the dog, traveling, hiking, and camping. 3. Portable design: This personal alarm is small in size and easy to carry. It can be hung on keychains, backpacks, ladies' bags, etc. It is suitable for students, the elderly, children, women, night - shift workers, and other groups. 4. Easy to use: Pull out the contact pin to activate the alarm. Insert the pin back into the device, and the sound will stop. Specifications: - Material: ABS - Dimensions: 674525 mm - Power supply: 3 LR44 button batteries Package contents: - 1 safety alarm Precautions: 1. Due to differences in monitors and lighting effects, the actual color of the product may vary slightly from the color shown in the picture. 2. Due to manual measurement, a 1 - 3 cm error is allowed. (1 inch = 2.54 cm) Thank you for your support!