Material: ABS Vibration sensor type: When it detects the vibration of the key or the door being priedor the body being kicked, the buzzer will sound. It is the minimum sensor required for a safety buzzer, so it can be combined with other sensors depending on the situation. [Makes you feel safer]: Double tap to enter alert mode, it will alert you if there is any action. The emergency siren can emit a loud sound (130 decibels) to attract attention to protect you from emergency situations. When threatened, activate sirens and flashing strobe lights to create a distraction and help deter attacks. Also, the siren is so loud that it will buzz your ear drums The perfect security siren for men, women and children [LED DESIGN]: This security alarm keychain also has an LED light to help you out in the dark. And a strobe light that shows where help is needed. Suitable for night running, dog walking, traveling, hiking, camping and other outdoor activities. [Small and Portable]: Small enough to easily fit in your pocket, hang on your keychain, put in your purse, hang on backpacks, ladies bags, etc. Suitable for students, the elderly, children, women, night shift workers, etc. No need to buy and replace batteries , just use the USB cable to charge. It feels better to clip it to the keys. [Easy to use and function]: When you pull out the contact pin, the female personal alarm is activated, and the pin is easy to pull out and push back to reset. Plus, here's a keychain, a flashlight, and a siren. Color: orange Size: 16*42*115mm Delivery Quantity: 1 Piece