When In Doubt, Hearo Out
Pull the pin to activate a 135 dB siren and flashing strobe light—catching the attention of everyone nearby and scaring off threats that don’t want to be seen or heard. Just reinsert the pin to stop the alarm.
Easy to use
No more struggling with complicated and dangerous self-defense tools.
Non-violent
Deter threats without getting into a fight and direct physical confrontation.

Travel-friendly
Designed for everyday carry and approved by airlines—take it with you anywhere.
Stay Safe On Your Adventures
Activate Guard Mode to turn Hearo into a door alarm. Just hang it on a handle, and if someone tries to enter, a loud siren will instantly scare them off and alert you to potential danger.
Perfect for:
When In Doubt, Hearo Out
Pull the pin to activate a 135 dB siren and flashing strobe light—catching the attention of everyone nearby and scaring off threats that don’t want to be seen or heard. Just reinsert the pin to stop the alarm.
Easy to use
No more struggling with complicated and dangerous self-defense tools.
Non-violent
Deter threats without getting into a fight and direct physical confrontation.

Travel-friendly
Designed for everyday carry and approved by airlines—take it with you anywhere.
Stay Safe On Your Adventures
Activate Guard Mode to turn Hearo into a door alarm. Just hang it on a handle, and if someone tries to enter, a loud siren will instantly scare them off and alert you to potential danger.
Perfect for:
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