2 pieces, personal anti-wolf alarm female elderly call for help anti-loss device back bag carry-on alarm self-defense alarm, portable safety alarm. Features :130 decibels of sound - can be heard hundreds of feet away, scaring off your attacker while attracting help. LED lights - help improve visibility for night walks, running, dog walking, hiking, camping, etc. Easy to activate - Simply pull the latch and the siren activates the lightweight and portable alarm keychain: The self-defense alarm can be connected to wallets, backpacks, keys, belt loops, suitcases, etc. You can also take the plane, very convenient, suitable for students, joggers, the elderly, children, women, can make a perfect gift to family friends and relatives.