Description Made of plastic material, easy to use. Mini size, portable design, all of that make you use it more freely. It is practical for the older, children and girls and women when they have an emergency. Be it on an unfrequented street, in a dark car park or near the home, the alarm will always be on guard. Features -Material: Plastic.-Size: About4.00X3.50X2.00cm/ 1.57X1.38X0.79in.-Sound: Above 125DB. - Power supply: 3 x LR44 batteries (included). -A personal alarm keychain protects your security, just pull the keychain and sound will get you heard.- Get the help you need quickly. Commonly used by seniors to call for help in case of falling, feeling unsafe, etc.- Requires no training or skill to operate. Equipped with LED Lights, very durable and long service life.- Commonly used by physically threatened, medical emergencies, accidents, or allergic reactions.- Great gift for parents, college students, and everyone that works evenings. Wonderful defense siren key chains for women.Packing list: 1 x self defense keychain Note: 1.Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 1701 hours Hope you have a pleasant shopping experience!