This alarm has a loud 120 dB alarm that is audible up to 1,150-feet (350-meters), helping to scare off a would-be attacker and attracts the attention of those nearby, helping you to escape to safety. This personal alarm is easy to operate; simply pull the key ring to remove the pin to sound the alarm. Replace the pin to turn the alarm off. Unlike other personal alarm keychains, this model features a built-in motion detector that can detect movement up to 15-feet (4.67-meters) away and scans at a wide, 120-degree range. Position the alarm on a stable table or attach it to a metal surface using the magnetic back – point the motion sensor in the direction of the area you want to monitor and set the alarm for an additional layer of protection against intruders entering your room. Attach your personal safety alarm to keys or a bag using the keychain for protection on-the-go.