Features: new and high quality sound is and . Up to 120db, spread furtherTransmission distance is far for calling for , recruiting companions and outdoor activities.It can be hung on tents, equipment, water bottles, backpacks, rings and other accessories.Wearable, practical and convenient.High frequency double tube survival .Survival supplies in harsh environments, to ensure that you can use less effort to emit the volume of a high-frequency in an emergency.Specifications: Material: Aluminum AlloyWeight: 35gLength: 4.2cmColor: Black/Navy/SilverPackage Includes: 1x Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to difference between different monitors, the picture may not reflect the actual color of the item.