Aluminum Alloy Dual Whistle Outdoor High Audio Zinc Alloy Knuckle and auxiliary parts

and auxiliary parts

Material: pure titanium + TC4 titanium alloy

and is small and portable

Function: Suitable for martial arts combat defense lifesaving

Aluminum Alloy Dual Whistle Outdoor High Audio Zinc Alloy Knuckle and auxiliary partsDouble tube blast design: 1. HIGH FREQUENCY PENETRATION: Designed to produce high frequency sound with powerful penetration. 2. 120dB WIDE RANGE COVERAGE: Provides up to 120dB of volume, capable of covering a wide area. Aircraft aluminum alloy material: 1. Hard anodized treatment: hard anodized process is used to enhance the wear and corrosion resistance of the material. 2. Waterproof and corrosion resistant: The treated aluminum alloy material has