10pcs Emergency Whistles Lifeguard Safety Whistle w/Lanyard Keychain for Outdoor Hiking Camping

Features:
Super loud: double tubes whistle has a loud sound and is easy to blow. The sound power provides up to 120 decibels, enough to be heard from a long distance.
Premium quality: made of aluminum alloy material, sturdy and durable. Brushed metal texture.
Personalized engraving: you can use laser engraving or CNC to engrave anyone's name, pattern Logo, or "go hiking" any words that do not exceed the engraving area;
Gift giving: suitable for friends who like hiking, climbing and outdoors, for dad, for grandchildren, mother's day, father's day or other festivals; 
Easy to carry: comes with a key chain and lanyard so it can be attached to a backpack, belt or hung around your neck. 
Multipurpose: the emergency survival whistle is suitable for outdoor activities, such as hiking, fishing, camping, boating, hunting, and can also be used for lifeguards, pet dog training, etc. 
Including 10 pieces: super cost-effective, 5 pieces in silver, 5 pieces in gold; 

Specifications: 
Product material: Aluminum alloy 
Product size: Length 55mmxwidth 15mmxthickness 8mm 

Notes:
Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 
Please allow 1-3mm measuring deviation due to manual measurement. Thank you for your understanding!

Packing list:
5 x Silver whistle     
5 x Gold whistle