1. Loud alarm sound of 130 decibels: This self - defense keychain alarm can emit a loud sound that may attract others' attention even from a distance. In dangerous situations, it can help scare off attackers and seek help from those nearby. 2. LED light design: This safety alarm keychain is equipped with an LED light, which can offer illumination in the dark. It is suitable for outdoor activities like 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 groups such as students, the elderly, children, women, and night - shift workers. 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: 67×45×25 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 a bit from the color shown in the picture. 2. Due to manual measurement, an error of 1 - 3 cm is allowed. (1 inch = 2.54 cm) Thank you for your support!