Small plastic whistle for your keychain, jacket's zipper or backpack. The whistle is made of waterproof and corrosion-resistant ABS plastic with no moving parts inside, making it extremely durable and works well in any environment.
Double tube design with no cork ball inside makes the sound louder and more stable. The volume near the exhaust port (within 10cm) can reach 130+dB.
Ages 5 and up