Feature With LED lights, the emergency alarms can be applied for night lighting, suitable for people at all ages such as students, elderly, children, women, night workers and so on; You can also use them for traveling, hiking, camping and dog walking at night. The safety alarm keychain has a portable size for easy storage and carrying; It can be attached to women's bags, backpacks, school bags, belt loops, suitcases, keys, dog belts and so on; And you can take it even you are on the plane. The Portable Personal Alarm uses superior environmental and durable ABS plasticn, resistance to fall, crush and voltage, and high temperature, and the copper plug, not rusty, beautiful and durable, won't break in your most adverse conditions. Easy to use the alarm will be activated when you pulled the contact pin out. To silence, just inset the contact pin in, the alarm will be off. A Safety Protector For Your Family Members,SOS device for the old. You can keep this personal body alarm on hand to use when you need urgent help Female anti wolf alarm Invest in a personal alarm that can help you attract attention and deter attackers in dangerous situations. A personal alarm will be good for a child who returns home during hours when there are many people around. Using a screwdrive open the rear cover and replace the battery. Battery type: LR44(3 pieces per alarm). Battery working time: 1.5hour(continuously making alarm sound). LED emergency light: 24-hour lighting. Color: Black & white & gold &pink & purple&silver Material: ABS Size about: 70*46*22mm Package Contents: 5*Vocal alarm 5*Instruction manual 15*Button Battery