Features: This 120dB high decibel double frequency whistles delivers powerful, far reaching sound with two distinct tones, ensuring visibility during critical situations while its waterproof design ensures reliability in harsh outdoor environments. Featuring a quick attach clip, anti slip mouthpiece, and adjustable lanyard, the whistles seamless construction prevents water ingress and withstands extreme pressure, making it ideal for adventures requiring compact survival gear. Essential for hikers, campers, and water sports enthusiasts seeking dependable outdoor safety equipment that combines portability with life saving functionality. Use it during wilderness emergencies, boating accidents, or extreme weather conditions where clear signals are important for survival and team coordination. Engineered with PP and reinforced braided cord, this whistles integrates seamlessly into survival kits, backpacks, or gear while meeting rigorous outdoor durability standards. Specifications: [Component]: PP, braided thread [Product Size]: about. 1.5x7cm/0.59x2.76in, wire 41cm/16.14in [Sound]: 120dB [Color]: 6 color optional Package Includes: 4pcs Signaling whistles note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.