An SOS Keychain is a handy accessory equipped with a small NFC (Near Field Communication) chip, designed for emergencies. This short-range wireless technology enables quick communication between devices when they're in close proximity, usually within a few centimeters. Each keychain can store your designated emergency contact information, ensuring that in a critical situation, anyone with an NFC-enabled device can tap the keychain to access vital details for prompt assistance. The nice thing is, they are small enough to be carried in so many ways. Clipped to a purse, placed in a wallet, or attached to a backpack. Say what needs to be said. Even if you can't speak!