There’s no bulkiness around your neck, nor is a monthly fee required—unlike some personal safety accessories. InvisaWear charms are everyday jewelry that also serve as safety devices. Worn on a bracelet, choker, necklace or keychain, a hidden button on the back immediately texts as many as five people if the wearer needs help. The small, stylish charm can also be attached to a purse or a scarf.

InvisaWear charms use Bluetooth Low Energy and work with a free phone application. The setup also includes an optional free 9-1-1 feature that shares a user’s location with emergency dispatchers. Notifications require a simple double click. It’s instant and discreet, and it can save lives.

Battery life is guaranteed for one year, and replacement charms are discounted.