Come and see our amazing products. Just pull the contact pin out or press the SOS button two times quickly, the personal alarm will sound.The personal safety alarm is designed with night lighting and waterproof function, SOS emergency alarm, lighting time can be up to 150 minutes. The emergency alarm can make a loud sound to draw attention to protect you from having an emergency even at distances as far as 606.9 ft. This personal alarm key chain is small and portable , compact and lightweight design makes it easy to portable. Pls confirm with us about the packing info, stock color and exact production time before placing your order.