Siren: 130DB (approximately) ^ Battery: 3*LR44^ Working current: 100mA^ Color: Silver^ Dimensions: 62mm x 40mm x 21.5mm Package Quantity: 1 piece In case of emergency, pull the ring pin on the crystal shield siren, and the crystal shield siren will immediately send out a high-decibel alarm sound to deter rescue, and the LED flashlight can also be used for lighting. Usually, it can be used as a key chain to tie one end to a mobile phone or other items, and the other end to be fixed on the body or in a bag. When the item falls off or in other emergencies, a strong alarm sound of 120 decibels will be issued when the latch is pulled out. To stop the alarm, just insert the latch. It is a very beautiful decoration and is every girl's personal bodyguard. Female students walk alone in the dark, if a suspicious person approaches, they can pull out the latch to deter the suspicious person and dispel their evil intentions; It is suitable for women who walk alone or run at night on night shift. If someone is following you, pull out the pull pin to call the police, and you can use the sound to deter suspicious persons; Elderly people suffering from acute diseases (such as coronary heart disease, etc.), carry an alarm with them or hang it by the bed at night. When the disease occurs and they cannot speak, pulling the pin to alarm may save your life; When traveling, if you get lost, you can pull out the pull pin to call the police and call for help to avoid missing; This alarm can also protect purses, mobile phones and valuables from being lost, stolen or robbed. Its use is suitable for each person; Button battery operation, less loss, small and easy to carry, can be used repeatedly.