Outdoor Survival Whistle

1. With a great airflow design, it can easy to whistle and make a loud, clear sound.
2. Compact size and portable mode, you can hang it on your bag or the key ring, very convenient to carry.
3. The loud whistle can be heard for far distance, suitable for diving, camping, hiking, etc.
4. An indispensable accessory for outdoor sports lovers and a unique gift to your friends.