GOGO Custom Engraved 20 PCS Brass Whistle with Bottle Opener Design Dual-use Whistles for Outdoor Camping Hiking

*Single-tube DesignThese whistles can produce high and low frequency sounds, can provide up to 120 decibel dB sound power, enough to be heard over a mile away. It works well as a signal whistle. You can use it easily and effectively to draw in public attention during an emergency situation. *Practical Gifts for FriendsYou can give the whistle to your family members, friends relatives, colleagues and neighbors on Christmas, Thanksgiving Day, New Year, graduation or other special days, and they will be delighted after receiving these gifts. *Multiple UsesThese whistles are suitable for camping, hiking, backpacking, hunting, archery, fishing, swimming, boating, kayaking, marine sporting events any kind of outdoor activities, also for dog training.

• Custom Your Whistle: Printing Method-Laser Engrave. You can add name, logo, slogan, number, saying, and cartoon on it.
• Material & Size: Made of premium brass, this whistle is incredibly loud and durable. Whistle Length: Approx. 2.5 inch/6.5cm. Width: Approx. 0.4 inch/1cm. Imprint Area:1.1 L x 0.4 W inch (3 x 1cm)
• Dual-use Design: This whistle also can be used as a bottle opener. It is portable.
• Super Loud: Single-tube design, each whistle can produce high and low frequency sounds, can provide up to 120 decibel dB sound power, you get people's attention when needed, enough to be heard over a mile away.
• Package Includes: 20pcs x whistle