Pure Titanium Survival Whistle Outdoor Camping Hiking High Frequency Whistle With Cord RXBBOOTDTY  100% brand new and high quality.Features:Titanium construction, corrosion-resistant and durable.Light weight with a cord for easy carrying.High frequency, can be heard from far distance.Suitable for emergency survival, hiking, camping, traveling, pet training, sports, boating, etc.Whistle Language:● short sound (within one second)■ long sound (more than 3 seconds)●●■(two short one long): gather in the direction of the whistle●■(one short one long): starting, speeding forward●■■(one short and two long): Someone is left behind, the front team needs to wait for the back team●●●(three short): Seek help in case of difficulty●●●■■■●●●(Three short three long three short): Universal SOS codeSpecification:Color: silverMaterial: pure titaniumSize: 55mm/2.17"×8mm/0.31"Weight: 5gQuantity: 1pcNote:Transition: 1cm=10mm=0.39inchPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Includes:1 × Titanium Whistle