The most effective way to protect your safety, it alert 3 people by text messages automatically in every 8 seconds, and people know you need helps and can see your location on the map.
Circle also comes with panic alarm which will keep away threats from you.
Circle has a neat looking that you can hang it on your handbag or using as a keychain instead of putting it in the bag.
You can quickly grab to use it when the emergency comes toward you