130dB Pocket SOS Alarm

One movement releases a 130-decibel siren, louder than an ambulance, that keeps sounding until the pin slides back in. No buttons to fumble for, no phone to unlock. The rest of the time it sits quietly on your keys: a bright LED for dark doors and hotel corridors, a replaceable AAA battery so it's never flat when it matters, and a finish you'll actually want to carry.

Small enough to forget. Loud enough that no one else will.