Self Defense Keychain Personal Alarm

Personal alarm siren is made of rechargeable lithium battery. Don't need to replace the battery, directly use the usb data cable to charge and charge time is only 30 minutes, then you can get one year in standby.With ear-piercing sound to draw others' attentions even 300 yards away when you in danger. Up to 90 mins of continuous sound to ensure emergency use. It will replace self-defense devices to protect your safety, as pepper spray.You can pull the contact pin out or press the switch 2 times quickly, to activate alarm.Light bulbs are bigger and brighter than flashlights of traditional security alarm.Self defense alarm can be attached to purse, backpack, keys, belt loops, and suitcases. It also can be brought onboard a plane, really convenient, fit for Students, Jand Night workers.