SABRE's Emergency Safety Whistle can help alert those around you if you're in danger. The whistle gets as loud as 120dB and can be heard up to 750-feet (229-meters) away, helping you call for help in an emergency. Waterproof and corrosion-resistant, this whistle has a double tube design with no internal parts to break or jam, allowing it to last longer for continuous use. The emergency safety whistle features a key ring and a detachable lanyard that allows you to carry it hands-free. Attach the whistle to your bag, backpack, or purse with the included carabiner clip. The whistle is easy to use - hold the end of the whistle opposite of the key ring and place it against your lips. After ensuring the holes are not covered on either side of the whistle, blow with steady airflow. Increasing airflow will increase the sound volume.